A balanced diet for sendintary worker

Bacteria and other microbes can be used to "clean up" an oil spill by breaking down oil into carbon dioxide and water. Two sampl

aksik [14]

Answer:

For sample A, A=17.7 %, T=17.7 %, G=32.30%, C=32.30%

For sample B, A= 28.9%, T=28.9%, G= 21.10%, C= 21.10%

Explanation:

The composition of nitrogenous bases in DNA is calculated using the suggestions proposed by the results of the experiment performed by Erwin Chargaff.

He found that in a DNA sample the composition of purine to pyrimidine is 1:1. This indicates that the amount of purine equals pyrimidine. This can be presented as purines + pyrimidines= 100. Also, adenine binds thymine and cytosine binds guanine.

In the given question,

For sample A

A= 17.7 %, Therefore, thymine will be = 17.7 %,

A+T= 35.40%

Now, G+C=100- 35.40%

G+C= 64.60%

content of G= 64.60/2= 32.30%

content of C= 32.30%

For sample B

T=28.9%, A will be= 28.9%

A+T= 57.80%

G+C=100-57.80%

G+C= 42.20%

Thus content of G will be= 42.20/2=21.10

content of C= 21.10%

Thus,

For sample A, A=17.7 %, T=17.7 %, G=32.30%, C=32.30%

For sample B, A= 28.9%, T=28.9%, G= 21.10%, C= 21.10%

6 0

3 years ago

4.010 Mutations can be caused by a. radiation b. chemicals C. both a and b

Ugo [173]

Answer:

Mutations can be caused by radiation

if my answer helps you than mark me as brainliest.

6 0

3 years ago

Name the structure that increases the surface area of the small intestine in humans.

lutik1710 [3]

The name of the structure that increases the surface area of the small intestine in humans is Villi.

<h3>What are the functions of the small intestine?</h3>

The small intestine performs a key role in the digestion of undigested food which comes through the stomach. It also absorbs all the essential minerals and nutrients from the food and is used by the body.

Villi or microvilli is the structure that increases the surface area of the small intestine for food absorption and adding digestive secretions.

Therefore, the name of the structure that increases the surface area of the small intestine in humans is Villi.

To learn more about the Small intestine, refer to the link:

brainly.com/question/17315460

#SPJ1

7 0

2 years ago

In a lake with three trophic levels (non-native fish, zooplankton, algae), an algal bloom occurs when the small population of zo

aev [14]

Answer:

The small population of zooplankton have an unequal effect on the marine community.

Explanation:

According to this question, there are three trophic levels of organism in a lake as follows: non-native fish, zooplankton, and algae. However, due to the declination in the number of zooplanktons in the lake as they were fed on by the non-native fish, the algal population increased to form a BLOOM.

This bloom of algal species can be attributed to the lack of zooplanktons, which represented the only herbivorous (plant eaters) organism in that community. Hence, their relatively small population have an unequal effect on the marine community. This means that the small population of zooplanktons caused an imbalance in the community and this is why ZOOPLANKTON is the keystone species in this scenario.

8 0

3 years ago

Which best describes the role of a primary consumer in a food web?

Soloha48 [4]

Answer:

Herbivore that feeds on producers

Explanation:

The producers are plants at the bottom of the food web. These are eaten by herbivores, that are the primary consumers.

Herbivores themselves are consumed by carnivores, which are secondary consumers.

Sometimes, these carnivores can be consumed by top predators, like a shark, snake or eagle.

Options and why they are right/wrong

Carnivore that feeds on producers - carnivores do not feed on producers

Herbivore that feeds on producers - this is correct

Herbivore that feeds on primary consumers - primary consumers are animals and herbivores do not eat animals

Carnivore that feeds on primary consumers - this would be a secondary consumer

4 0

3 years ago

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