Addition of antibiotic in a media will disrupt the bacterial cell. The end result of this process is either killing the bacteria or slowing down its growth. However, antibiotic resistance can develop along the way. Survival of some bacterial colonies can be possible. Antibiotic can lead to DNA damage. This will lead to accelerated resistance to the antibiotic treatment.
In daisies, flower color is controlled by incomplete dominance. The two alleles are blue (B) and red (R). The heterozygous phenotype is expressed as purple.a. What is the phenotype of a plant with the genotype BB?b. What is the phenotype of a plant with the genotype BR?c. What is the phenotype of a plant with the genotype RR?
Answer:
a. Phenotype: blue
b. Phenotype: purple
c. Phenotype: red
Look at the picture provided Answer this While imagining you removing the chocolate chip cookies with a toothpick, you may not have thought to minimize damage to the cookie while mining for chips. What techniques could even be used to help reduce the impact of mining on the cookie? *how do you think this might affect the cost of my mining?*
When you start to remove the chocolate chips of the cookie the general structure of the cookie will change, because the cookie was prepared and baked thinking about the uniformity of the structure and the interactions between dough and chocolate chips. A toothpick can surfacely take out the chocolate drops, but there is still a portion of chocolate inside the cookie. So to minimize the demage in the general structure and be possible to extract the chocolate, you can try other techniques such as heat the dough and separate the solid mass from the chocolate that will be semi-solid, not affecting the form of the cookie. In mining of underground material, the choosing of the best form of extraction is crucial to cause the least environmental damage to the explored area.
What happens during meiosis?a) Chromosome pairs separate to form new sex cells, increasing genetic variation.b) Each sex cell copies itself to form four new sex cells that are all identicalc) Each sex cell loses half of its chromosomes, decreasing genetic variationd) Chromosome pairs remain together when new sex cells are formed, maintaining the same level of genetic variation
Meiosis is a reductional division, which involves two rounds of division and results in four haploid cells.
During meiosis I, the homologous chromosomes pair and recombine, and after that, they are separated into two haploid cells.
During meiosis II, the sister chromatids are separated, and a total of four haploid cells are produced.
Of the options, the sentence that better describes what happens in meiosis is A, chromosome pairs separate to form new sex cells, increasing genetic variation.
lipids are true polymers , true iron false?
Lipids are not true polymers, although they can be found grouped with other same molecules, as in the cell membrane. So the answer to that statement is False.
Try to explain this to me in a couple sentences if you can. *Physical ways to speed up or slow down a reaction AND why a specific physical change affects the rate ofreaction.
One physical way to change the speed of a chemical reaction is by managing the temperature of the reaction.
In biological processes, different enzymes act to catalyze specific reactions, and each enzyme has a specific maximum efficiency temperature, that can be handled to control the rate of the reaction.
Which macromolecules are responsible for carrying the genetic material in a cell?
Macromolecules are molecules that are responsible for the biophysical processes of the body. Lipids consists of lycerol that are combined with fatty acid molecules. Carbohydrates are macromolecules responsible for the source of vital energy of the cell. Proteins are macromolecules that are fomed by amino acids. The macromolecules responisble for carrying the genetic material in a cell are the nucleic acuds. It is responsible for the continuity of life because they bring the instructions to the cell for it to function.
Answer - Nucleic acids
Is this statement accurate? Explain shortly Does it need to be reworded or does it need some additional comments about how the aggressive & nonnative invasive species was able to invade the southern U.s?
Answer: This plant was used for soil erosion control. But its fast-growing characteristics became a problem as it turned out to be invasive.
Explanation: I suggest you add this statement to add information on why Kudzu became a problem.
How would applying petroleum jelly to the leaves affect the rate of transpiration? (This would create a thick film over the leaf, clogging the stomata)
Plants eliminate water vapour through the stomata found in their leafs, this is the proccess of transpiration. When the plant has excess of water, the stomata are open and water vapour is eliminated, when the plant is dehidratated, the stomate close to avoid the loss of water, this way, the plant preserves it.
If you apply petroleum jelly to the leafs, you will obstruct the stomata. This will render the plant unable to eliminate water vapour, i.e. the plant wont be able to transpire. As a result, the rate of transpiration will decrease.
What is being shown in this picture?(Image description: large yellow round sun on the left. Small grey round moon in themiddle, but to the right of center. Middle-sized blue and green round Earth to theright with half shaded darker. The moon casts shadows on the Earth, labeled"umbra" and "penumbra".)
Shown in the picture is a solar eclipse. The sun's light is being partially or completely blocked by the moon.
Picture attached below.Nucleus is not an acceptable answer - be specific. Spelling of scientific terminology is important.
In the present diagram, we have a plant cell with its corresponding organelles, the order is as follows
1.-This corresponds to a chloroplast, we can identify it easily by the shape of a disc and the thylakoids in the interior.
2.-Here we have a specific part of the nucleus, which is also known as the nucleolus, this area is composed of RNA and proteins, is in charge of assembly ribosomes.
3.-Cytoplasm is the interior medium of the cell and is contained by the plasmatic membrane.
4.-This is the endoplasmatic reticulum, in specific the rough endoplasmatic reticulum is depicted and can be easily identified by the ribosomes in the surface.
5.-This is a vacuole is one of the biggest areas we can find in a plant cell, commonly it stores starch.
6.- Cellular wall is the outer part of a plant cell and can be identified because is the one that gives the shape of the cell.
7.-This is mitochondrial and can be easily identified by the baskets in the interior.
8.-This are membranous vesicles, probably lysosomes, which contain digestive enzymes and are involved in the recycling and disposal of cell debris.
Antibiotic resistance occurs when bacteria are able to withstand the effects of the antibiotics designed to kill them. How does resistance against a newly developed antibiotic most likelyarise naturally in one species of bacteria?A. A random mutation occurs in the genetic sequence of a bacterial cell, which gives it resistance to the antibiotic.B.The need to adapt forces some bacteria to destroy the antibioticC.A scientist inserts a gene for antibiotic resistance into the DNA of several bacteria.D.The exposure to antibiotics causes some bacteria to secrete enzymes that fight against the antibiotics.
The correct answer is A. A random mutation occurs in the genetic sequence of a bacterial cell, which gives it resistance to the antibiotic. Random mutations allow bacteria to overcome antiboitics effects, since they allow the escape of the antibiotic target.
What was Jean-baptiste de Lamarck theory about and his theory name
Lamarckism is a theory that stated that evolution is linear and tends to "perfection", and that the organisms can inherit traits that they developed in their life to their offspring.
Blood type has how many alleles associated with it?A. 1B. 3C. 4D. 2
The four main blood types are A, B, AB, and O. There are three alleles associated with the human blood type known as A, B, and O. We inherit one allele from our mother and the other from our father.
Answer - B. 3
Are all responses to the environment immediately obvious? Be specific and explain your reasoning.
Not all reactions to the environment happen right away. For instance, if you touch a flower every day, the blossom will start to wither even if you don't see it.
Briefing:Anytime you bother an animal, it will either attack you or flee. Responses to the environment may or may not be immediate depending on the circumstance.
What environment means?The environment is a dynamic, living system that includes not just physical space but also a recognition of time and social roles. Our environment profoundly shapes our thoughts, emotions, and behaviours as well as how we view and interact with the world around us.
What is importance of environment?Healthy living and the continuation of life on Earth both depend on the environment. Earth is home to many different living beings, and we all rely on it for necessities like food, air, and water. Therefore, it is imperative that each individual protect and preserve our ecosystem.
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DNA was extracted from cells of Staphylococcus bacteria and analysed for base composition. It was found that 37% of the bases are guanine. What percentage of the bases are thymine? (
Explanation:
-You know that the complete DNA is 100% and that from that total 37% is guanine.
-With that information you can deduce that 37% is cytosine (remember what we talked about above about G-C base complementarity).
-That means that 74% is occupied by those two bases C and G (37+37=74) and therefore 26% is left for the rest of the bases.
-The bases left are T and A, as they are complementary to each other what remains to do is divide that 26% in two.
Answer:
-13 is the percentage of thymine bases.
Marty made a table to compare oxygen and ozone. What correction needs to be made?A. Ozone is not located in the atmosphere, but in the lithosphere.B. Oxygen absorbs harmful UV radiation, ozone helps living things release energy from food.C. Oxygen is O3, ozone is O2.D. Oxygen is produced by photosynthesis, ozone is not.
Marty said that ozone is located in atmosphere, and it is correct. The lithosphere is above the atmosphere, being the layer that first receives the sun rays, but the ozone is created and is a part of the atmosphere. Therefore, a) is incorrect.
Ozone is the only gas able to filter the ultraviolet radiation, and oxygen is necessary in cellular respiration, the process in which living things release energy from food. Therefore, Marty was right about those things and b) is also incorrect.
The ozone is composed of a molecule of oxygen (O2) + a free oxygen (O) = O3. So, Marty was correct, oxygen is O2 and ozone is O3. Therefore, c) is also wrong.
Marty said that oxygen is used in respiration, and that's correct. But, in order to be used in respiration, oxygen must become available via photosynthesis, the process in which carbon dioxide (CO2) is used to release O2. So, oxygen is produced by photosynthesis. Ozone is produced when the UV rays breaks a molecule of oxygen (O2) into two separate oxygen atoms. One of those atoms becomes united with another O2 molecule, creating Ozone (O3). Therefore, the ozone isn't produced by photosynthesis, like Marty said, and oxygen is. So, d) is the correct answer.
Give a description and one or two examples of these functions in the body. (Energy)Could you please simplify/condense the answer to as few sentences as possible? Please and thank you.Could you also separate the description and examples once you're finished writing?
When we are talking of energy in a wide range of levels, that goes from the food intake to the molecular level, involving protons and ions cascades. The energetic input for the body starts when food is ingested, through its process in the digestive system the food is decomposed into smaller compounds, that will be transported into the different organs and cells of the body. The primary source of energy in humans is glucose (sugar), this molecule follows a metabolic process where ATP and NADHP, are generated, which are none other than the main energetic molecules in the cell. The order of processes is as follows: glucose enters glycolysis, then goes to Krebs cycle, and finally to mitochondrial electron transport chain, generating a maximum of 38 ATP molecules per glucose molecule.
Example
When we are sleep deprived, the bain needs a higher energetic intake to function properly, therefore, we increase our food consumption, generally, we seek, sugary food. This is because glucose enters immediately to the metabolic route described before, and energy is sented to the brain.
Energy can be derived from fossil fuels and alternative natural sources.What are two advantages of using nuclear fission as an energy?
Answer
some advantages of nuclear fission as a source of energy include;
Cleaner energy source than fossil fuels
Low amounts of fuels is required to generate energy
Can last longer periods of time
Describe how other fields of science assist in contributing to scientific explanations across fields.
Answer: Research and discoveries in one field of science can benefit the explanation or understanding of related or dependent phenomena under another field of science.
Explanation:
There are three primary fields of science:
Physical Science - Includes physics, chemistry, astronomy, and the study of inorganic and inanimate objects.
Earth Science - Includes geology, oceanography, meteorology, and the study of the Earth's history, structure, properties, and biotic evolution.
Life Science - Includes living organisms, biology, botany, microbiology, zoology, physiology, and biochemistry.
As discoveries and explanations are found in one field of science, they can apply to other fields of science where interdependencies exist. For example, the discovery of a new prehistoric species in Earth sciences may explain the biological and hereditary adaption of an existing species being studied today under Life sciences. Similarly, discoveries in physics and chemistry may identify opportunities to better understand or address issues within the ocean (Earth Sciences) or perhaps for a related zoological species (Life Sciences).
Choose from the following list to label each component in the dicot stem cross-section below. A term may only be used once; some terms will not be used when labeling
Answer:
Instead of drawing I decided that we label the arrows from top as A, B, C, D and E.
A - Cortex
B- Endodermis
C - Phloem
D - Xylem
E- Epidermis
Explanation:
The epidermis is a single layer of cells on the outside that protects the inner tissues.
The cortex consists of parenchyma cells. These large, thin-walled cells have leucoplasts to store starch and large vacuoles to store water and dissolved sugars. Intercellular spaces between parenchyma cells facilitate the movement of water from the root hair cells on the outside of the plant to the xylem on the inside of the plant.
The endodermis forms the innermost layer of the cortex. It is a layer of tightly-packed, modified parenchyma cells. The radial and transverse cell walls are thickened with a water-impermeable, waxy suberin layer, known as the Casparian strip.
The phloem tissue is responsible for transporting food from the leaves of the plant to the cells of the root. The cambium separates the xylem and phloem tissues from each other. This is the area where secondary growth of xylem and phloem tissues occur. Xylem tissue is responsible for transporting water and dissolved mineral salts to the xylem tissue of the stem and leaves
I need help with this practiceHow did the harmful and aggressive species ‘Kudzu’ come into the U.S.A?
Speciation is best defined as:A. A pressure that determines which traits are successfulB. Variation that helps an organism to surviveC. Development of a new speciesD. Differentiating to complete a specific function
The speciation process is best defined as the development of a new species (c).
Explain how and why the amount and/or type of carbohydrates consumed are adjusted by vegan diets
Complex carbohydrate foods include fiber and protein, which allow the food to be digested more slowly compared to simple carbohydrates. Your body will stay full for longer if you eat fiber-rich carbohydrates.
because the food is digested slowly
12. Is it possible for an animal in an ecosystem to be considered as both a predator AND as prey? Explainyour answer and include an example to support your answer.
When we are talking of predators we have to refer to food chains, and these can be very complex, here is where we can find organisms that act as both, predator and pray at the same time. They receive the name of small predators, those that only act as predators and are not consumed by any other organism, are called apex predators. One good example of a small predator we can find it, with certain snakes, consume small animals like little rodents, and in turn, the snake is hunted by birds of prey like eagles.
42. What do scientists use to make millions of copies of a specific region of aDNA fragment?A. gel electrophoresisB. restriction enzymesC. polymerase chain reaction
The polymerase chain reaction is a technique in which a DNA sequence is multiplied (amplified) using short complementary sequences called primers. These primers delimit the size of the sequence to be amplified and a polymerase enzyme amplifies the sequence by the addition of nucleotides.
unlike electrophoresis (which separates DNA sequences according to their size) and restriction enzymes (which cut DNA into smaller pieces), the polymerase chain reaction, also called PCR, is the only technique that can produce millions of copies of a DNA sequence.
Which property of water best explains why larger bodies of water can moderate the temperature in the surrounding area?
The high specific heat of water makes it possible for large bodies of water to moderate their temperature.
In short, for water to increase its temperature by 1°C, a large amount of heat is required.
Therefore, it can be stated that the correct property is "high specific heat".
In the eukaryotic cell, organelles called peroxisomes contain an enzyme that turns hydrogen peroxide (H2O2) into water (H2O). Suppose a biologist is measuring how temperature affects the rate at which the enzyme converts a quantity of H2O2 into water. Which of the following tools should the biologist use to make her measurements?
C: A thermometer and a stopwatch. Since temperature is importatnt here, it's good to have a thermomenter to measure the change in temp. A stop watch is important to oberserve how long it takes for the reaction to take place.
Algae belong to the kingdom ProtistaAlgae refers to many phyla that carry out photosynthesis. Write down the following divisions found in Algae and underneath each division write down the pigment found in it as well as the type of chlorophyll found in it Chlorophyta Phaeophyta Rhodophyta
Chlorophyta:
Pigment: Chlorophyll, carotene and xanthophyll.
chlorophyll a and b.
Phaeophyta:
Pigment: Chlorophyll, carotene and fucoxanthin.
chlorophyll a, c1 and c2
Rhodophyta:
Pigment: chlorophyll and phycobilin
chlorophyll a
Question 2 of 10A stretch of river running through a state wildlife preserve is 25,000 m long. Ateant of conservationists make a scale model of the river that is 1 m long.What is the scale of the model?OA. 1:1B. 10:25C. 2,500:1D. 1:25,000
-We call scalar the relationship that exists between the magnitudes that a drawing has and the real dimensions of the object.
-Normally the scale used in the drawings is usually indicated by a proportion.
-Normally when we have to draw elements that are much larger than the available paper it is necessary to reduce their size proportionally.
In this case we need a reduction scale and the correct option is D. 1:25,000
One meter in the model is equal to 25000 m long of reality
The environment outside the plasma membrane is most appropriately referred to as____________A) intracellular space B) cytosol C) extracellular space D) Intersticial spaceE) C or D choices
As we know cell membrane isolates the interior of the cell from the outer medium, it depends on the cell type the way we refer to this. So with this in mind, we can proceed to analyze each available option.
A) This is the inner space of the cell so this cannot be.
B) Cytosol is also part of the inner medium of the cell so this cannot be either.
C) This is correct, as its name says, is the space outside the cell.
D) Interstitial space, as defined, it is said is the space between two components, even more, in some cases, it is taken as a synonym of intercellular space, so this also could be a correct answer.
E) As we can see both options C and D are correct, nonetheless the most precise is option C, even more in the case of animal tissue the proper name would be extracellular matrix. Therefore we can say that this is the correct option.