Answer:
Because there will be no trace of any infection before 7 days because eukaryotic parasites start spreadinv in 7 days and lasts till one month.
Explanation:
Eukaryotic parasites needed to be reported after 7 days because they start spreadinv in 7 days after exposure and last till one months. Before 7 days there won't be any trace of eukaryotic parasites because they will not have start spreading by then because eukaryotic parasites grow slowly that prokaryotic parasites so there will be slower disease progression.
Most damage caused by eukaryotic parasites is due to their growth inside host cell and eukaryotic infections are difficult to treat because their physiology is similar to that of man.
Eukaryotic parasites are parasites that live inside their host causing damage and having nucleus and membrane bound organelles.
Which of the following organisms have some strains that naturally carry a circular, 6.3-kb, 2-micron plasmid?
A. Escherichia coli
B. Saccharomyces cerevisiae
C. Agrobacterium tumefaciens
D. Drosophila melanogaster
Answer:
B
Explanation:
The correct answer for the organism with strains that naturally carry a circular, 6.3-kb, 2-micron plasmid would be Saccharomyces cerevisiae.
Most strains of Saccharomyces cerevisiae have been found to possess extrachromosomal elements in their nucleus. This extrachromosomal element is circular in nature and of about 2 microns and 6.3 kb without any known specific advantage or function.
Due to the simple nature of the yeast's plasmid, it has been a major source of study for the understanding and control of how replication works in eukaryotic organisms.
The correct option is B.
How does the length of the man compare to the length the of the yeast cell
Answer:
Yeast, any of about 1,500 species of single-celled fungi, most of which are in the phylum Ascomycota, only a few being Basidiomycota. Yeasts are found worldwide in soils and on plant surfaces and are especially abundant in sugary mediums such as flower nectar and fruits. There are hundreds of economically important varieties of ascomycete yeasts; the types commonly used in the production of bread, beer, and wine are selected strains of Saccharomyces cerevisiae. Some yeasts are mild to dangerous pathogens of humans and other animals, especially Candida albicans, Histoplasma, and Blastomyces. As fungi, yeasts are eukaryotic organisms. They typically are …(100 of 333 words)
Explanation:
The region of the abdominopelvic cavity that is inferior and medial to the left lumbar region is the:
Answer:
The correct answer is - hypogastric region.
Explanation:
The hypogastrium (additionally called the hypogastric region or suprapubic locale) is an area of the abdomen situated beneath the umbilical region. The pubis bone comprises its lower limit. The underlying foundations of the word hypogastrium signify "beneath the stomach"; the foundations of suprapubic signify "over the pubic bone".
The hypogastric region (beneath the stomach) contains the organs around the pubic bone. These incorporate bladder, some portion of the sigmoid colon, the anus, and numerous reproductive organs, for example, the uterus and ovaries in females and the prostate in guys.
Thus, the correct answer is - hypogastric region.
T lymphocytes are responsible for ________ and maturation occurs in the ______ Group of answer choices the humoral immune response, bone marrow. the cellular immune response, thymus. producing antibodies, tonsils programming macrophages, bone marrow
Answer:
the cellular immune response, thymus.
Explanation:
T lymphocytes are cells which form a part of the immune system called the cellular immune response due to their responsive nature to foreign bodies.These cells originated from stem cells found in the bone marrow and they help to fight against any infections and cancerous cells in the body.
T lymphocytes are however also known to undergo their maturation in the thymus cells of the body.
Who first recognized that species were groups of organisms that were distinguished from other such groups by their ability to reproduce?
Answer:
John Ray
Explanation:
John Ray was widely known for his involvement in the establishment of species as the ultimate unit of taxonomy. He gave a widely accepted definition of the word species which made it clear including the fact that any seed derived from the same plant was the same species, despite it's different traits.
Engli
Relating Tectonic Activity to Formation of Sedimentary Basins
Answer the questions using the drop-down menus.
At what type of boundary do strike-strip basins form?
At what type of boundary do wedge basins form?
At what type of boundary do rift basins form?
At what type of boundary do arc basins form?
Answer:
1) Strike strip basins form at transform boundary
2) Wedge basins form at convergent boundary
3) Rift basins form at divergent boundary
4) Arc basins form at convergent plate boundaries
Explanation:
1) Strike-slip fault can be which are horizontally blocks that have vertical fractures are found in transform boundaries
2) Wedge basins which occur at a convergent plate boundary are made from sediments from their growth are involved in the flexture of the subducting and non-subducting tectonic plate in a downward direction
3) A Rift basin is one that is formed during the process of the rift formation as the continental crust is stretched
4) Arc basins is a basin formed at the back of an island
5.
is the process by which artificial means are used to protect an individual
from a specific disease.
Cowpox
b. Microbes
c. Vaccination
a.
Answer c..Vaccination
Explanation:
Which center bears the primary responsibility for generating the respiratory rhythm, but is influenced by several other centers
Answer:
This is the Ventral Regulatory Group-VRG
Explanation:
In the medulla,there are four groups of neurons which forms the exhalation parts of the respiratory control.These 4 groups are called the VRG.They occupy 5mm anterior in length, and laterally positioned to the dorsal respiratory group.They are therefore said to occupy the ventrolateral part of the medulla.
The dorsal respiratory group(DRG) consists of the inspiration neurons,contrary to the VRG. They do not extend to the DRG,but the DRG, extends to them
They(VRG) function in propagating action potentials needed for the mechanisms of respiration.(exhalations), and Inspirations
Which one of the following is the most common site for a leiomysarcoma to occur? Hydrometra appears sonographically as a/n _______________________.
Answer:
The correct answers are -
a) An intramural (confined to the myometrium)
b) Sonolucent fluid collection in the uterine canal
Explanation:
A leiomyoma, otherwise called fibroids, is an amiable smooth muscle tumor that rarely becomes malignant growth. They can happen in any organ, yet the most widely recognized structures happen in the uterus, little entrail, and the throat. Uterine fibroids are noncancerous developments of the uterus that frequently show up during childbearing years. Likewise called leiomyomas.
Hydrometra is a large and descriptive term that refers to a distended uterus filled with clear, non-infected fluid. Fluid accumulation in the uterus is termed hydrometra that appears as a Sonolucent fluid collection in the uterine canal sonographically.
Given that the probe pairs with a specific DNA strand in the matrix, what can you conclude about the nucleotide sequence of the Baby’s DNA fragment that pairs with the probe sequence?
Answer:
The matrix can be used to detect the expression of the target gene
Explanation:
DNA probes enable to identify target acid nucleic sequences (i.e., DNA or RNA) that are capable of hybridizing with the probe. The probe is usually labeled with different 'detectors' (i.e., radioisotopes, fluorophores, epitopes, etc), thereby allowing its detection by observing the response to the hybridization process. For example, a DNA microarray can be used to detect simultaneously the expression of thousands target genes.
The conclusion related to the sequence of baby DNA fragment should be that the matrix is used for detect the expression of the target gene.
What is DNA?The probe of DNA should enable for identifying the target acid nucleic sequences. Also, it should be labeled along with the distinct detectors. Also, it permits detection by observing the response to the hybridization process.
Hence, we can say that The conclusion related to the sequence of baby DNA fragment should be that the matrix is used for detect the expression of the target gene.
Learn more about DNA here: https://brainly.com/question/22729671
What is a possible effect of long-term environmental changes?
adaptation
migration
habitat loss
starvation
Answer:
adaptation
Explanation:
did the pre test
Long-term environmental changes can have various effects on the organisms and ecosystems that inhabit them, and one possible effect is habitat loss, which is the third option.
What are environmental changes?Long-term environmental changes are changes that occur gradually over time, such as changes in temperature, rainfall patterns, or atmospheric conditions, and can have significant impacts on ecosystems and the organisms that inhabit them. One of the primary effects of long-term environmental changes is habitat loss. For example, climate change is leading to melting ice caps, rising sea levels, and changes in weather patterns, which can impact habitats such as coral reefs, forests, and wetlands, causing them to shrink or disappear. This can result in the loss of habitat for many species, leading to declines in their populations and potential extinction.
Hence, long-term environmental changes can have various effects on the organisms and ecosystems that inhabit them, and one possible effect is habitat loss, which is the third option.
Learn more about the environmental changes here.
https://brainly.com/question/22637966
#SPJ7
If body fat has decreased but the scale has stayed the same, this means your client has gained which of the following?
a. Fat mass
b. Water weight
c. Bone density
d. Lean mass
Answer:
d. Lean mass
Explanation:
It happens when your body fat percentage is going down while gaining muscle. If your body fat percentage is going down but not your weight, you'll be dropping inches in no time, and this is an indication that you are moving in the right direction.
Answer:
d. Lean Mass
Explanation:
With the practice of exercise and a well-balanced diet, what usually happens is an increase in lean mass, associated with the loss of body fat.
This gain of lean mass mainly with people who practice resistance and strength exercises, such as weight training and Crossfit.
The bodyweight remains unchanged, even if the individual's body measurements change. That is since muscle mass weighs more than fat mass, with less volume.
The attached image shows the difference in volume for the same muscle weight (lean mass) and fat.
What is ovulation?
A. When an egg enters the fallopian tube
B. When an egg implants into the uterus
C. When an egg is produced in the ovary
D. When an egg is fertilized
Answer: A. When an egg enters the fallopian tube
Explanation:
Ovulation is when an egg is produced in the ovary. Therefore, the correct statement is option C.
What is ovulation?Ovulation is the process by which a mature egg is released from the ovary during the middle of the menstrual cycle. Ovaries contain thousands of immature eggs which then undergoes maturation and further develop.
When an immature egg reaches maturity, it releases into a single, fully developed egg that passes through fallopian tube towards the uterus. If the egg is fertilized by a sperm cell in uterus, it results in pregnancy.
If the egg is not fertilized, it will be expelled from the body during menstruation. This process is regulated by a hormones and feedback mechanisms, such as hypothalamus, pituitary gland, and ovaries. Several factors like stress, illness, and changes in body weight can affect ovulation and also the fertility.
Therefore, an egg is produced in the ovary during ovulation.
Learn more about the ovulation here:
https://brainly.com/question/25724530
#SPJ5
True or false. If Americans decided to eat more chicken and less beef, the future size of the chicken population would increase and the cattle population decline. True False True or false. Resources that are commonly owned are likely to be over-utilized and poorly maintained. True False True or false: Ocean fisheries are generally owned in common; as a result, the quantity of various species such as salmon are often overfished.
Answer:
The given first statement is true, that is, with the increase in the demand for chicken, the chicken market will rise, and in the same way with the decline in the demand for beef, the production of cattle will decrease based on the law of demand.
The given second statement is also true, as the resources mentioned in the given statement is a tragedy of commons as the common access resources are rivalrous and non-excludable.
The given third statement is also true, as the mentioned ocean fisheries is a tragedy of commons as the common access resources are rivalrous and non-excludable.
Which of the following processes is/are example(s) of diffusion and/or osmosis that occur in your cells? Mark all that apply
a. O2/CO2 moving in/out of your blood cells as they flow through your lungs.
b. Na+ (sodium) & K+ (potassium) ions moving between the inside and outside of you nerve cells creating electrical impulses.
c. H2O moving in and out of all your cells to maintain homeostasis.
d. All of the above
e. None of the above
the answers are (a.) and (c.)
The examples of diffusion/osmosis that occurs in our cells are as follows:
O2/CO2 moving in/out of your blood cells as they flow through your lungsH2O moving in and out of all your cells to maintain homeostasis.DIFFUSION/OSMOSIS:
Diffusion is the process by which gaseous molecules move from a region of higher concentration to low concentration until they are evenly distributed. Osmosis, on the other hand, involves the movement of water from region where it is more concentrated to region where it is less concentrated via a semipermeable membrane.Both osmosis and diffusion are forms of passive transport, meaning that movement occurs down a concentration gradient. The following are examples of diffusion/osmosis that occur in human cells:O2/CO2 moving in/out of your blood cells as they flow through your lungsH2O moving in and out of all your cells to maintain homeostasis.Note that, option B is a form of active transport.
Learn more: https://brainly.com/question/18067330?referrer=searchResults
A disadvantage of using an attenuated live microbe in a vaccine is that it can conceivably mutate back to a virulent strain.
a. True
b. False
Answer:
True
Explanation:
Live attenuated vaccine are vaccines that contain a weakened part of the live virus or bacteria and protect the immune response of people with healthy immune system and does not cause disease.
These type of vaccine create a strong immune response but does not work for people who have weak immune system.
Examples of live attenuated vaccines are,
Rotavirus vaccine
Nasal flu vaccine.
A disadvantage of live attenuated vaccine is that it can conceivably mutate back to a virulent strain,They can cause disease, due to genetic reversion or to infection of immunocompromised hosts.
Another disadvantage is that they are difficult to maintain and stored.
Which effect is most likely to occur as a result of clear-
cutting?
extinction of species
death of organisms
speciation
global warming
Answer:
Death of organism
Explanation:
Human activities include the clear-cutting of areas of forest to make space for farming.
Which effect is most likely to occur as a result of clear-cutting?
Is this your question?
Death of organisms effect is most likely to occur as a result of clear-cutting.
What do you mean by clearcutting?Clearcutting is an extreme logging method in which resilient natural forests are harvested and replaced with man-made tree plantations that do not replicate the ecosystem services of a healthy forest.
Clearcutting is one of the most publicly maligned and misunderstood forest regeneration treatments. It is the only way to grow trees that require full sunlight to reproduce, such as tulip poplar, black cherry, and aspen, and the fastest way to provide/create shrubland habitat.
Clear-cutting often contributes to reductions in root strength and soil water-holding capacity, due to soil compaction and reduced transpiration. Moreover, the removal of the forest cover exposes the soil surface to heavy precipitation and large variations in temperature.
Learn more about clear-cutting:
https://brainly.com/question/7324699
#SPJ6
Which of the following is a characteristic of every magnet? A It is always in the shape of a horseshoe, with the two prongs being opposite poles. B It will have a single pole, either south or north, depending on the charge of the magnet. C It has two poles, and each pole is attracted to the same pole of another magnet. D It has two different poles, north and south, that each attract the opposite pole of another magnet.
Answer:
The answer is option D.
It has two different poles, north and south, that each attract the opposite pole of another magnet.
Hope this helps you
Answer:
D
Explanation:
It has two different poles, north and south, that each attract the opposite pole of another magnet.
Cystic fibrosis (CF) is one of most common recessive disorders among Caucasians it affects 1 in 1,700 newborns. What is the expected frequency of carriers of the CF gene? What proportion of matings in the population could produce a child with CF? What is the expected incidence of CF among the offspring of two parents who are both carriers?
Answer: The expected frequency of carriers is P(Aa)=0.046.
The proportion of childs with CF is P(aa)=0.024.
25% of having a child with CF (aa).
Explanation:
Hardy-Weinberg's principle states that in a large enough population, in which mating occurs randomly and which is not subject to mutation, selection or migration, gene and genotype frequencies remain constant from one generation to the next one, once a state of equilibrium has been reached which in autosomal loci is reached after one generation. So, a population is said to be in balance when the alleles in polymorphic systems maintain their frequency in the population over generations.
Given the gene allele frequencies in the gene pool of a population, it is possible to calculate the expected frequencies of the progeny's genotypes and phenotypes. If P = percentage of the allele A (dominant) and q = percentage of the allele a (recessive), the checkerboard method can be used to produce all possible random combinations of these gametes.
Note that p + q = 1, that is, the percentages of gametes A and a must equal 100% to include all gametes in the gene pool.
The genotypic frequencies added together should also equal 1 or 100%, and all the equations can be summarized as follows:
[tex]p+q=1\\(p+q)^{2} = p^{2} +2pq+q^{2} = 1\\P(AA)=p^{2} \\P(aa)=q^{2} \\P(Aa)=2pq1[/tex]
So, there are 1700 individuals and only one is affected. Since it is a recessive disorder, the genotype of that individual must be aa. So the genotypic frequency of aa is 1/1700=0.000588.
Then, [tex]P(aa)=q^{2}=0.000588[/tex]. And with that we can calculate the value of q,
[tex]P(a)=q=\sqrt{0.000588}=0.024[/tex]
And since we know that p+q=1, we can find out the value of p.
[tex]p+0.024=1\\1-0.024=p\\p=0.976[/tex]
Next, we find out the genotypic frequency of the genotype AA:
[tex]P(A)=p=0.976\\P(AA)=p^{2} = 0.976^{2}=0.95[/tex]
Now, we can find out the genotypic frequency of the genotype Aa:
[tex]P(Aa)=2pq=2 x 0.976 x 0.024 = 0.046[/tex]
Notice than:
[tex]p^{2} + 2pq + q^{2} = 1\\x^{2} 0.976^{2} + 2 x 0.976 x 0.024 + 0.024^{2} = 1[/tex]
Then, the expected frequency of carriers is P(Aa)=0.046
The proportion of childs with CF is P(aa)=0.024
If two parents are carriers, then their genotypes are Aa.
Gametes produced by them can only have one allele of the gene. So they can either produce A gametes, or a gametes.
In the punnett square, we can see that there genotypic ratio is 2:1:1 and the phenotypic ratio is 3:1. So, there is a probability of 25% of having an unaffected child, with both normal alleles (AA); 50% of having a carrier child (Aa) and 25% (0.25) of having a child with CF (aa).
Which of the following correlation coefficients is less likely to occur?
0 a. -.54
O b. + .22
O c. -0.78
O d. +.16
Answer:
c. -0.78
Explanation:
Correlation coefficients are used to measure the relationship between two variables. correlation coefficients lies between -1 and +1.
Correlation coefficients greater than zero indicates positive correlation, less than zero indicates negative correlation and zero shows no relationship between the two variables.
Large positive or negative correlations have very less chances to occur, so large negative correlation will have less chances to occur because sampling variation gives large negative correlation by chance.
Hence, the correct answer is c. -0.78.
The first glycolysis rate-limiting enzyme is under various allosteric regulations. This protein is nearly inactive because of inhibition by ( ) under physiological conditions. The activity is restored by ( ), its most potent allosteric activator.
a. AMP :::: citrate
b. AMP :::: Fru-2,6-P2
c. ATP :::: citrate
d. ATP :::: Fru-2,6-P2
e. All of these
Answer:
d. ATP; Fructose-2,6-bisphosphate
Explanation:
Phosphofructokinase-1 is the enzyme that catalyzes the formation of fructose-1,6-bisphosphate from fructose-6-phosphate and ATP. The phosphofructokinase step is the first rate-limiting step of glycolysis.
Phosphofructokinase-1 activity is allosterically regulated. Its activity is increased whenever the cell's ATP supply is depleted or when its breakdown products, ADP and AMP accuulates in he cell. However, it is inhibited when the cell is amply supplied with ATP.
The activity of phosphofructokinase-1 is restored by fructose-2,6-bisphosphate, its most potent activator.
From the given options:
a. AMP :::: citrate is wrong because AMP increases the activity of phosphofructokinase-1 and citrate is not its activator but an inhibitor
b. AMP :::: Fru-2,6-P2 is wrong because AMP increases its activity same as fructose-2,6-bisphosphate
c. ATP :::: citrate is wrong because both citrate and ATP are inhibitors
d. ATP :::: Fru-2,6-P2 is correct as explained above
e. All of these is wrong because of the other wrong options above.
Which process involves wind moving loose sediment?
abrasion
deflation
impact
plucking
Answer:
Deflation
Explanation:
got it right on edge2020
The process that involves wind moving loose sediments is the deflation. Deflation is further described below.
What is deflation?Deflation is a type of wind erosion that involves the displacement of movement of loose materials from flat dry and non cemented surfaces such as the deserts and dry lakes.
The wind is the major factor that causes deflation in wind erosion, therefore the stronger the wind the bigger the pieces of sediments the wind can pick up.
Therefore,the process that involves wind moving loose sediments is the deflation.
Learn more about sediments here:
https://brainly.com/question/329212
#SPJ5
Unattached earlobes are dominant to attached earlobes. Cleft chin is dominant to no cleft. Parents that are heterozygous for both traits are crossed. Determine the ratios of offspring with: Unattached earlobes and cleft chin
Answer:
the Unattached earlobes and cleft chin = 9/16
Answer:
the Unattached earlobes and cleft chin = 9/16
Unattached earlobes and no cleft = 3/16
Attached earlobes and no cleft = 3/16
Attached earlobes and no cleft = 1/16
Explanation:
on edg
Drag each label to the correct location. Sort the examples based on whether they describe a physical change or a chemical reaction. Please help!!
Answer:
See explanations below.
Explanation:
growth of seed into seedling
- chemical (bio-chemical) change. The seed will never be there in its form again, the properties of the growth are different from the seed.
wax melting
- physical change. When heat is withdrawn, it reverts to the same solid wax, with only different physical properties (such as shape or texture).
making caramel
- chemical change. it is almost like burning part of the sugar content. The browning cannot be changed back to white sugar, smells and tastes different. However, on part of the sugar has undergone chemical change.
Tarnishing of silver
- chemical change. The brown substance is silver sulphide due to reaction of silver with sulphur dioxide present in minute quantities in the air. The silver can be made to shine again by REMOVING the silver sulphide, not by reversing the change.
grinding wheat to make flour.
- physical change. The compound is still flour that contains mainly starch. The chemical properties are the same as wheat, in providing nutrients, etc.
Adding copper and gold to make jewelry.
- physical change. The two metals together make an allow, which is basically a mixture. Both physical and chemical properties of the individual metals remain.
Purple petal color in pea plants is dominant to white petal color. Two heterozygous pea plants are crossed. What ratio of the offspring will have white petals?
Answer:
If both parents are heterozygous for the same trait, it means that both parents have both of the alleles, one for purple petals and one for white petals, so the crossing will lead to an offspring that will present the following genotype proportions:
Purple-colored petals (dominant characteristic, both alleles dominant) - 1/4
Purple-colored petals (dominant characteristic, one allele dominant, one allele recessive) - 2/4
White-colored petals (dominant characteristic, both alleles recessive) - 1/4
Answer:
1. 1:4
2. 25%
Explanation:
Just got it right on edge 2020
Which event is associated with tornados?
sea levels rising due to high waves
coastal flooding due to storm surge
paths of damage up to 50 miles long
wind and rain lasting for several days
Helpppp
According to the question, paths of damage up to 50 miles long is correct.
The destructive power of storm surge and large battering waves can result in loss of life, buildings destroyed.
Are tornadoes increasing in frequency?There's been no observed increase in the frequency of major tornadoes over time.
Thus, option "C" is correct.
To learn more about tornadoes click here:
https://brainly.com/question/14484573
Fill in the blank. Will give brainliest!
Answer:
Plants, glucose, ATP
Explanation:
In cellular respiration, Plants use glucose to make ATP. Bascially they breakdown the sugar to harvest ATP from it.
Here's the representation:
Disclaimer: The cells in both plants and animals perform respiration. Therefore, best answer is "Aerobic organism" for first blank but if your teacher has not been that specific then people usually learn about plants when talking about respiration.
Answer:
Cells, glucose + oxygen, ATP/Energy
Explanation:
All cells perform cellular respiration, so plant cells and animals cells can be used in the 1st blank (although they have different process of doing so). The molecule that is most commonly used in cellular respiration is glucose (C₆H12O₆). It goes through glycolysis and the Krebs Cycle(Animals) or the Calvin Cycle(Plants), then into the mitochondria to produce ATP and energy.
a gymnast has a weight of 600 in each hand is 150cm calculate the pressure of the floor doing a handstand
Answer:
20
Explanation:
pressure =force/area
150cm ×2=300cm^2
600÷300=20
I think this is right, you need to put the units on your answer
Atrial and ventricular systole do not overlap under normal condition because of which of the following?
a) a delay of the action potential at the atrioventricular node
b) rapid conduction by the internodal pathway
c) rapid conduction by the bundle branches
d) the atriventricular node setting the pace of contractions
Answer:
) a delay of the action potential at the atrioventricular node
Explanation:
The reason for the short delay of 0.9s. is to ensure maximum contractions of the atrial to eject blood into the relaxed ventricles.(ventricular filing).
Thus when the atrial is contracting,the ventricles relax and vice versa.The short duration for the artrial contraction to occur for blood ejection into the relax ventricles guarantee that artial systole can not overlap the ventricle systole.
The artial must contract first for the ventricle fillings,and when this is completed,the atrioventricular valves closes,and blood flow through the aorta to the systemic circulation from the left ventricle and into the pulmonary circulation through the pulmonary vein.
This occurs simultaneously with both the R and L Artrial,and right and left Ventricles.
Jacob wants to learn how he can help ensure that the biodiversity of earth no longer decreases. which topic should he research?
A. reducing pollution and preserving wildlife habitat.
B. areas on earth with large amounts of un-mined coal.
C. demand of rainforest timber and exotic animal's
D. energy generated from wild and high-cost windmills
Answer:
C. demand of rainforest timber and exotic animal's
Explanation:
Biodiversity refers to the combination of biological and diversity. In this, it shows the varieties of life than could be found on earth in terms of plants, animals, etc
For not reducing the biodiversity on earth, Jacob should be researched on rainforest timber demand and the exotic demand so that the biodiversity could not decline
Therefore the option c is correct
Hence, all the other options are wrong.