Ecology: Competition
In ecology, competition means that several organisms need the same resource, of which there is a limited amount.
Competition can be intraspecific when the organisms are from the same species, or interspecific, when the organisms competing are from different species.
The resources can be food or water, but also territory or mates, so it applies to resources needed not only for survival but also for reproduction.
This means the right answer is A There are more living things than there are resources to support them.
Where do the light dependent reactions of photosynthesis occur?
The light-dependent reactions of photosynthesis occur in the membrane of thylakoids, inside the chloroplast and cyanobacteria.
A group of students measure the mass of a soil sample.They record the following measurements: 65.7 g, 69 g, 60 g, and 64.58 g.The actual mass of the soil sample is 68.0 g. Which measurement is the most precise?A. 65.7 gB. 69 gC. 60 gD. 64.58 g
The most precise measurement is the one that is closest to the actual mass of the soil sample. If the actual mass is 68.0 g, the measurement that has the closest number to 68 is option B. 69 g
Answer:64.58
Explanation:
most precise measurement because it extends to the hundredths place.
Planet 55 Cancri e has two primary factors that make the formation of diamonds highly likely. What are these two factors? Please help it due today
Planet 55 Cancri e is composed primarily of carbon (in the form of diamonds and graphite), along with trace amounts of iron, silicon carbide, and maybe silicates. Therefore, it makes the formation of diamonds highly likely.
What is Planet 55 Cancri e ?Exoplanet 55 Cancri e goes around its Sun-like host star 55 Cancri A. The mass of the exoplanet is about 8.63 Earth masses, and its diameter is about twice that of Earth. This makes it the first super-Earth found around a main sequence star, a year before Gliese 876 d.
Temperatures there are high enough to cause rocks to melt and vaporize, and it is possible that there are oceans of lava with clouds that rain molten rock.
Therefore, the two factors are presence of carbon and high temperatures.
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Draw a picture showing active transport of a material into or out of your organism’s cells.My organism is great white shark
Active transport is that in which energy (ATP) is used, without ATP it cannot occur and normally requires the intervention of transport proteins.
Active transport requires ATP because the transport of molecules usually occurs against a concentration gradient, i.e., the solutes go from the medium with a lower concentration to the medium with a higher concentration.
in the 1930s the cane toad was introduced into eastern Australia to help control a destructivebeetle population. The population of cane toads quickly increased and spread westward.Today.the king told population continues to move westward at greater rates than in the past periodscientists compared the traits of cane toads that have recently invaded a region of WesternAustralia with cane toads that have inhabited a region of eastern Australia since the 1940s. Thescientists determined that cane toads from populations that are currently expanding intowestward Australia have different characteristics than those of cane toads from establishedpopulations in eastern Australia. Specifically the western Australian cane toad now have thefollowing characteristics.larger forearms, a narrower pelvis, longer hind legs the offspring of the western toads alsohave the traits of their parents how does this example support the scientific theory ofevolution?a. By showing that different inherited adaptations can be observed in separate populationsof a species.b. by showing that multiple alleles can form in populations of a species existing in differentlocations.c. by showing that competition for mates can lead to changes in characteristics within aspeciesd. by showing that specific mutations can prevent the original species from migrating.
This example supports the scientific theory of evolution by showing thar multiple alleles can form in populations of a species existing in different locations. (option b)
1. In which phase of mitosis are the chromosomes most tightly packaged?a. ProphaseO b. AnaphaseO c. MetaphaseO d. Cytokinesise. Telophasef. Interphase
Answer
A. Prophase
Explanation
In the prophase, transcriptional activity ceases and chromosomes condense into tightly packed, microscopically visible structures. Sister chromatids connect to one another at regions called centromeres, upon which large multiprotein kinetochore complexes are ultimately assembled
i just wanted to know the cycle of carbon oxygen?
The option with the role of the plants in the carbon-oxygen cycle is the one that says: they release oxygen into the air as a waste product of photosynthesis.
The question can be answered by looking at the photosynthesis equation:
photosynthesis equation
6CO2 + 12 H2O + Light ------> C6H12O6 + 6O2 + 6H2O
The Plants are related to the carbon-oxygen cycle by the process of photosynthesis that is the form that these organisms get energy to survive and make food since they are autotrophs. The plant take CO2 from the atmosphere, with light and water to convert these molecules into glucose (energy/food), water, and oxygen. The oxygen from photosynthesis is released into the atmosphere and into the oxygen cycle, while de carbon dioxide that is take in the begining is part of the natural carbon cycle.
What is an example of resting membrane potential?
Resting membrane potential refers to the neuron that has a voltage across its membrane. It is determined by the concentration gradients of ions that cross the membrane and by membrane permeability to each type of ion.
For example, when the resting state happens, the sodium-potassium pump maintains the difference of charges across the cell membrane. It uses energy in ATP in order to pump positive sodium ions (Na+) outside the cell and potassium ions (K+) into the cell. The inside of the neuron becomes negatively charged compared to its outside environment as a result.
24. In the 1830s, the scientist who developed the cell theory also stated that plant cells and animal cells are similar innature. Which of the following most likely led to this statement?A. the observation of cells with a nucleus in themB. the knowledge that new cells replace old cellsC. the theory that cells form through spontaneous generationD. the observation of some cells with well-defined rectangular shapes
Plant and animals cells are both eukaryotic cells. They both contain a nucleus. The theory from 1830's tells us that all living things are made up of one or more cells. The cell is considered as the most fundamental unit of life. The nucleus is the most significant cellular part of the cell.
Answer - Option A - the observation of cells with a nucleus in them
I need help with number three 3. If you wanted to grow only tall pea plants in your garden over several growing seasons, which of the following genotypes would give you the best results?
If you wanted to grow only tall pea plants in your garden over several seasons, the best option would be to cross pea plants that are homozygotes of the tallness allele: TT.
Answer:TT
Explanation:esy
Molecular clocks are another source of empirical evidence that scientists collect to support evolutionary theories. Explmultiple lines of empirical evidence to support theories of common ancestry and biological evolution. Include informaticlessons, and scientific reasoning to support your claim.
answer and explanation
For each genotype, indicate whether it is pure or hybrid.
Let's define what symbols mean in Genetics:
• Two capitalized letters signify a homogenous dominant genotype, i.e BB. This is what is known as ,purebred,.
,• One capitalized and one lowercase letter signifies a heterozygous dominant genotype, i.e Bb. This is what is known as a ,hybrid,.
,• Two lowercase letters signify a homogenous recessive genotype, i.e bb. This is also ,purebred,.
Using this information, we can answer the question provided to us:
0. Bb - since there is one capitalized and one lowercase letter, it will be a heterozygous genotype. Therefore, it will be a ,hybrid,.
,1. Cc - same case with #1. It is a heterozygous genotype and therefore a ,hybrid,.
,2. FF - since there are ,two, capitalized letters, it will be a homozygous dominant genotype. Therefore, it will be ,purebred,.
,3. PP - same case with #3. It is a homozygous genotype and therefore a ,purebred,.
,4. Mm - same case with #2. It is a heterozygous genotype and therefore a ,hybrid,.
,5. XX - same case with #4. It is a homozygous genotype and therefore a ,purebred,.
,6. EE - same case with #6. It is a homozygous genotype and therefore a ,purebred,.
And we have found which genotypes are hybrids and which are purebreds!
3. Describe the importance of water in the process of excretion?
Answer:
Water Helps Your Body Remove Waste
Explanation:
Adequate water intake enables your body to excrete waste through perspiration, urination, and defecation. Water helps your kidneys remove waste from your blood and keep the blood vessels that run to your kidneys open and filter them out.
How does the brain primarily interpret the strength of a stimulus in the nervous system?Question options:A) Based on which chemicals are released at nerve junctionsB) Based on the frequency of the action potentialC) Based on how much potassium is in the nerve cellD) Based on the size of the action potential
The correct answer is B) Based on the frequency of the action potential. As more action potential are gathered, the brain gets more intense in the signal carried by those action potentials.
The Calvin Cycle is another name for what?a) chlorophyll moleculesb) light-dependent reactionsc) light-independent reactiond) photosynthesis
The Calvin Cycle is a phase of the photosynthesis that occurs in the chloroplast stroma. In this phase, the plant doesn't need the light, being the cycle of the photosynthesis that occur during the absence of light, being known as "light-independent reaction". Therefore, the correct answer is
What are the four major adaptations that evolved in gymnosperms?
There are several key evolutionary adaptations in gymnosperm compared to earlier plants groups, being four of the major adaptations the:
- They produce pollen (a sperm containing pollen);
- They do not need water for reproduce, being the sperm carried through the air;
- They have seeds that protect the fertilized egg cell on land by making possible that the plant can survive in a dry space and stay for viable for much more time than happened in the earlier plants groups;
- The development of stomata, cuticle, and other structures that regulate the levels of water evaporation, also having the support structures to maintain the plant in position without the need of a body of water.
Were horses on North America in Ancient times, and if so, were they different than the horses of today?No, Europeans brought horses to North America later in time.Yes, but they were much smaller than the horses of today.No. Horses were not on North America until the start of the American Revolution.Yes, but they were larger than the horses of today.
No, Europeans brought horses to North America later in time.
Identify the organelle where photosynthesis takes place. (4 points)BНЕA60FH H
Question:
Solution:
The chloroplast is where light energy is converted into energy that can be used by plants (sugar). This process is called photosynthesis. According to the image, we can conclude that the correct answer is:
E
The average human being is composed of how many cells?
The human body is composed of around 37 trillion of cells.
Answer:
37.2 trillion cells
Explanation:
1. As plants and organisms die , their physical matter enters the ground and becomes what ?A: fossil fuelsB:dead matterC: renewable resourcesD: natural resources2. What does being sustainable have to do with your carbon footprint?A: Being less sustainable increases your carbon footprint.B: Being less sustainable lowers your carbon footprint.C: Being more sustainable increases your carbon footprint.D: Being more sustainable lowers your carbon footprint.
As you say, dead plants and animals produce compounds that are highly rich in hydrocarbons, and we know them as fossil fuels, due to the ancient of these deposits.
But also they could become renewable resources, especially in short term, since others organisms will use the nutrients they release into the environment.
So the answer must be C. renewable resources.
What often occurs when inbreeding takes place in a population?A) Disorders increaseB) Disorders decreaseC) Health increasesD) People are happier
Solution:
The consequences of high levels of consanguinity produce an increase in the frequency of genetic anomalies, mainly monogenic pathologies of a recessive nature, a decrease in biological efficiency, and an increase in mortality.
Then, we can conclude that the correct answer is:
A) Disorders increase.
When antibiotics were first introduced many years ago, they were highly effective in treating infections caused by bacteria. However, in recent years, antibiotics have become less effectivein treating bacterial infections, most likely due to their overuse and misuse. The best explanation for the decrease in antibiotic effectivenessA.bacteria gained the ability to fight against the effects of the antibiotics from the nutrients in their environment.B.antibiotic-resistant bacteria survived, reproduced, and passed their resistant genes to new bacterial generations.C.killed bacteria release enzymes that give surviving bacteria increased resistance against antibiotics.D.the human immune system transferred antibiotic resistance to the bacteria.
The reason why antibiotics have become less efective is that bacteria have acquired immunity against them, developing antibiotic resistant genes due to a misuse of them for threating diseases, genes that eventually are passed to the next bacteria generation. Considering this, we can say that the correct answer option is second one (B), which states "antibiotic-resistant bacteria survived, reproduced and passed their resistant genes to new bacterial generations".
The best explanation to the decrease in effect of antibiotic is antibiotic -resistant bacteria survived, reproduced and passed the resistant genes to the new generation.
Antibiotic is a group of medicine that fights against bacterial infection. They are taken in two forms - first, orally and second, through injection.
Antibiotics were discovered from Penicillium thus, giving the name penicillin to the first ever antibiotic. The way antibiotics work is by targeting the bacterial- gene and destroying them.
Even though the power of an antibiotic differs, there are many antibiotic resistant bacteria. These bacteria produce an endospore (a covering like structure around the bacteria) which gives them nutrition when the environment is not favorable. In this way they survive the effect of antibiotics and live throughout. The bacteria that survived the effect of the antibiotic then reproduced and passed on the resistant genes to the next bacterial generation.
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Explain the relationship between each pair:Starch & GlycogenCould you please simplify the answer to a few sentences? Please and thank you.I'm using this information for a learning guide (which is not graded - it is used to get understand course content)
Starch and glycogen are types of polysaccharides. Starch is the stored form of sugar or carbohydrates found in plants while glycogen is found in animals.
As an optician, you help to diagnose many common eyedisorders, such as nearsightedness and glaucoma. Currentlyin your office is Gabriel, a young boy who you just diagnosedas having red-green colorblindness. His parents, Catalina andRobert, seem surprised by this diagnosis, as neither of themis colorblind. They have many questions aboutcolorblindness. Using your knowledge of human genetics, youdo your best to answer their questions.
We can indicate the allele for colorblindness with lowercase b, and the allele for normal vision with a capital B. None of Gabriel's parents have the disease, but her mother is a carrier. This can be expressed as follows:
Gabriel's father
BB
Gabriel's mother
Bb
Another consideration that's needed to be done, is that this is an X chromosome-linked condition. We also know that XX is the chromosomes inherited by females, and XY the chromosomes inherited by males.
Having considered this, we can say that Gabriel's parents would have the following genotypes:
Gabriel's father
XBY
Gabriel's mother
XBXb
We have then this Punnet Square:
Upon this, we can say that there's an odd of 25 % of having a son with the disease, while a 75 % of having a healthy offspring (25 % of having a carrier daughter, and 50 % of having healthy-non carriers children).
So the correct statements of the question are the first one, the second one, and the final one.
what is so important about water, carbon, nitrogen, and phosphorus?
The importance of water, carbon, nitrogen, and phophorus for the living being and environmemt is huge, they are molecules essencial for the living process such as:
- Being part of the biogeochemical cycles;
- Being key nutrients for living organism, because they are part of the composition of biomolecules as proteins, nucleic acids, and carbohydrates;
- They are finite so being part of organic and inorganic process is a must.
Therefore, all alternatives are true about how important these molecules are to the life on Earth.
7. The diagram below represents cellular growth that can occur in human skin after long exposure to ultraviolet light.Which statement provides the best explanation for this growth pattern?A. Uncontrolled mitotic division occurred as a result of gene mutations.B. Manipulation of genes caused the movement of embryonic skin cells.C. An immune reaction triggered the formation of excess blood cells.D. Exposure to light stimulated the development of cells containing ozone.
This abnormal growth of the skin's cells can be attributed to the ultraviolet light that can cause mutations in the genes that control their mitotic processes. We can see how this is stated in the first answer option: "A. uncontrolled mitotic division occurred as a result of gene mutations".
Vaccination has been shown to cause autism.Select one:TrueFalse
As we know vaccines have been a very controversial topic, and one of them is autism, even when this has been proved false and the original paper where it was published the study retracted, there still a number of people who argue that this is true, even when evidence in favor of vaccine safety is overwelming. Therefore the correct answer is false.
The environment is changing rapidly for populations of every wild species. All else being equal, which population would have the greatest chance of adapting successfully to environmental change?Group of answer choicesA small population with high genetic variation would have the greatest chance.A small population with low genetic variation would have the greatest chance.A large population with low genetic variation has the greatest chance.A large population with high genetic variation has the greatest chance.
In this case, we have that small population tend to be unstable that is to say they are not very resilient to change, of course having high genetic variability increases the population's chances of survival, a small number of individuals makes them vulnerable to change. In the case of a large population, having great genetic variability is a good way to maintain population even in the face of changing conditions, therefore the correct answer is the last option,
The antibiotic tetracycline targets the 30S ribosomal subunit. A) Explain why this would kill a bacterial cell.
The antibiotic tetracycline is being taken for seven days or less by pneumonia and other infections involving the respiratory tract and other infections of the skin and urinary systems that are bacterial in nature. It is an antibiotic that combines with the 30S ribosomal subunit that hinder in translation by supressing the growth of bacteria. By this action, the ability of the ribosomes to integrate proteins for the growth and endurance of the bacteria will be damage and eventually kill the bacteria.
Please help me with the question?1.One of the central themes in biology is how DNA, RNA, and proteins are related. Describe how genetic information flows between those types of molecules. Include the results of the processes of transcription and translation.
These relationships constitute what is known as the "central dogma of biology ". DNA stores all the genetic information of the cell, the coding DNA is trancribed in the nucleus to messenger RNA. It contains the information of the amino acid sequence of the proteins and is exported to the cytoplasm to be traduced to proteins by ribosomes. In the process of traduction also ribosomal RNA and transfer RNA are involved.
DNA, RNA and proteins are related through a theory called the central dogma of life. Here, it is believed that information flows in only one direction.
In central dogma, DNA is replicated, and RNA is formed, from RNA proteins are taken out by translation.
The replication of DNA into RNA is known as transcription. Transcription has three stages- the first one is initiation, where the DNA makes a copy of itself from a complementary strand. When transcription takes place, it starts from a point known as origin of replication or ori and have a complementary strand and lagging strand.
The second step is the elongation here, the new fragments formed are elongated. These new fragments are also known as Okazaki fragments.
The last step to transcription is termination. Here, the synthesizing of new strand is terminated using various sequences. After transcription is over, translation takes place that is the protein forming from the synthesized RNA.
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