BIOLOGY HIGH SCHOOL

A "limiting factor" is something that limits the number of organisms that a certain ecosystemcan support. Why is this process so important to understanding the number of plants that can be
supported by an ecosystem?

Answers

Answer 1
Answer:

Answer:

umm chile

Explanation:

me dont understand because im slow

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A vessel that carries blood back to the heart is a(n) A) artery B) capillary C) vein D) arteriole

Answers

Veins bring the blood from the body to the heart.

Why is hydroquinone used in one of the experiments in the lab?

Answers

Hydroquinone is used in lab experiments due to its ability to act as a reducing agent, antioxidant and developing agent. It’s properties make it valuable in various chemical reactions and processes, enabling scientists to analyse, protect and produce substances effectively.

What was significant about the rocks Darwin found in the mountains

Answers

He found sea fossils high on the mountain, evidence that continents and oceans had changed over time

Which of the following is a consequence of water polluted by human sewage? a. pathogens
b. disease vectors
c. high levels of contaminants
d. all of the above

Answers

Answer;

-All of the above

-pathogens, disease vectors, and high levels of contaminants

Explanation;

Water pollution is a large set of adverse effects upon water bodies (lakes, rivers, oceans, groundwater) caused by human activities. Water pollution is caused by;

  • Increases in nutrient loading may lead to eutrophication.
  • Organic wastes such as sewage and farm waste impose high oxygen demands on the receiving water leading to oxygen depletion with potentially severe impacts on the whole eco-system.
  • Industries discharge a variety of pollutants in their wastewater including heavy metals, organic toxins, oils, nutrients, and solids.
  • Discharges can also have thermal effects, especially those from power stations, and these too reduce the available oxygen.
D. all of the above. I'm pretty sure

In one generation, the frequency of the A allele is 70 percent and the frequency of the a allele is 30 percent. What are the chances of an individual in the next generation having the genotype aa if the population is in genetic equilibrium? 49% 42% 30% 9%

Answers

Answer:

The correct answer would be 9%.

As the population is in genetic equilibrium, then the population must be following the Hardy-Weinberg equations:

p + q  = 1 and

p² + q² + 2pq = 1

The frequency of A (dominant allele) in a population is 70 percent.

Thus, the value of p would be 70/100 which comes out be 0.7

Similarly, the value of q would be equal to 0.3

The frequency of individual with homozygous recessive genotype, that is, aa would be equal to q².

So, q² = (0.3)^(2) ⇒ 0.09

Thus, the frequency of individual with genotype aa would be equal to 9 percent.
9%

Why?
The frequency for allele a is 30% or 0.3. Let's call this frequency p.
p^2 would then represent the frequency of genotype aa (this is is derived from the formula p^2+2pq+q^2=1 where p and q represent alleles a and A respectively. So p^2=aa, pq=Aa and q^2=AA)
0.3^2=0.09 or 9%

Tina conducted an experiment to test her hypothesis. Her hypothesis was that by crushing aspirin and putting it into potting soil increases the growth rate of tomato plants. The results of the experiment show that there was no significant difference in the growth rates between the control and the experimental groups. What should Tina do with the results of this experiment?

Answers

Tina should think about results and why aspirin did not affect the growth rate of tomato plants. She may find the answer in literature or can apply the results on the new situation. She may change the hypothesis and alter some factors in the experiment to test the new hypothesis.

Answer:

d) the longest answer that i’m too lazy to type (starts w/ “use the results...”

Explanation:

just finished test prep
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