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Svetach [21]
3 years ago
6

Which of these serves as a reference for comparison during a scientific investigation?

Biology
1 answer:
icang [17]3 years ago
3 0
That would be C. The control group is the group where no variable has been changed for it and it’s how something normally would be.

For example if we’re experimenting the effect of excess water on plant growth the plant getting normal amount of water is the control group and the plant getting excess water is the test group(or groups in most cases there is more than one).

You can use the growth of the control plant as a reference of how the growth of the other plant has been affected(wether it has been increased or decreased or stayed the same)
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Hardy Weinberg Practice Problems To demonstrate your understanding of the Hardy-Weinberg equilibrium, answer each question caref
andriy [413]

Assuming that the affection is a recessive trait caused by a single diallelic gene, the percentage of the population that possess the heter0zyg0us advantage is 32%.

<h3>Available data</h3>

  • 1000 of African people population
  • 4% of the population is born with sickle cell anemia

100% of the population -------------------- 1000 individuals

4% of the population with anemia------- X = (4 x 1000) / 100 = 40

0.04 is the frequency of individuals with sickle cell anemia.

Assuming that the affection is a recessive trait caused by a single diallelic gene, we can get the allelic frequency as follows.

  • The genotypic frequency is q² =  0.04
  • The allelic frequency is q = √0.04 = 0.2

Having the recessive allelic frequency, we can get the dominant allelic frequency, by clearing the following equation,

p + q = 1

p = 1 - q

p = 1 - 0.2

p = 0.8

So, the allelic frequencies are

p = 0.8

q = 0.2

To get the heter0zyg0us frequency, we just need to replace the values

2pq = 2 x p x q = 2 x 0.2 x 0.8 = 0.32

The frequency of the heter0zyg0us genotype is 0.32 = 32%.

32% of the population possess the heterozygous advantage.

You can learn more about Hardy-Weinberg equilibrium at

brainly.com/question/8667324

6 0
2 years ago
Can more than one dichotomous key be developed to identify the same group of organisms? Explain. To answer this question, refer
rewona [7]
<span>Certainly. Every organism has a variety of different characteristics. One person writing a key might choose to use different characteristics than another person would use.

For example: Here's a key for separating fish, snake, frog and mouse

1.
A. Has scales on its skin ... 2
B. Has no scales on its skin ... 3

2.
A. Breathes with gills - fish
B. Breathes with lungs - snake

3.
A. Has hair or fur - mouse
B. Has no hair or fur - frog

Here's a different key for the same four animals:

1.
A. Has four legs ... 2
B. Does not have 4 legs ... 3

2.
A. is warm-blooded - mouse
B. is cold-blooded - frog

3.
A. has fins - fish
B. has no fins - snake</span>
8 0
3 years ago
Why do cells need to carry out
AlladinOne [14]

Answer:

B

Explanation

They have to realease things somehow

5 0
3 years ago
Read 2 more answers
The process of genetic engineering may include either four or five steps. The diagram represents the five-step process. mc010-1.
Lyrx [107]
The answer is "B", recombinant DNA.
7 0
3 years ago
Hunter-gatherer societies are often _____. permanent semipermanent very dense nomadic
zmey [24]

Hunter-gatherer societies are often nomadic. I believe.

8 0
3 years ago
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