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disa [49]
4 years ago
5

Why is it useful for an ecologist to identify the keystone species in an ecosystem?

Biology
2 answers:
Alik [6]4 years ago
6 0
The correct answer is C. <span>The keystone species is critical to maintaining the stability of an ecosystem, and changes in its population indicate changes in ecosystem health. </span>
Bas_tet [7]4 years ago
6 0

The right option is; C. The keystone species is critical to maintaining the stability of an ecosystem, and changes in its population indicate changes in ecosystem health.

Keystone species are the species such as jaguar that has a superfluous impact on its environment relative to its population. The keystone species are important for the general function and structure of an ecosystem and they have an influence on the composition (in terms of plants and animals) of an ecosystem. It is useful for an ecologist to identify the keystone species in an ecosystem because the keystone species is important to maintaining the stability of an ecosystem, and any changes in the keystone species population shows that there is changes in ecosystem health.


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QUICK CHECK
slamgirl [31]

Scientists claim that Bisphenol A when ingested may cause brain problems,  behaviour and reproductive development problems in foetus, children and even infants.

Option D.

Explanation:

Bisphenol A was a very common compound to produce polycarbonate bottles. This bottles were very commonly used to produce baby bottles, different beverage containers, different water bottles etc. Until 2010, BPA was allowed as a safe to consume ingredient by WHO but after 2010,they strictly restricted the levels of BPA in food because it has severe ill effects in human body.

Even low amounts of BPA in food can cause hypertension, coronary heart disease, atherosclerosis etc. Although not proven, but BPA is thought to cause cancer. Effects on children and infants are more prominent which can cause problems in development of reproductive structures and brain. Even in adults, the brain problems may lead to change in their behaviors.

5 0
4 years ago
Why do the number of organisms in a group change from the first step to the last step of a dichotomous key?.
Anastaziya [24]

Firstly the question is incomplete as an option is not there.

Why do the number of organisms in a group change from the first step to the last step of a dichotomous key?

a. The number of organisms decreases because the number of common characteristics of the organisms in a group increases.

b. The number of organisms increases because the number of common characteristics of the organisms in a group increases.

c. The number of organisms is cut in half because the number of common characteristics of the organisms in a group decreases by half in the last step.

d. The number of organisms stays the same because the number of common characteristics of the organisms in a group decreases by half in the last step.

The correct answer is B. The number of organisms increases because the number of common characteristics of the organisms in a group increases.

The most common key for the identification of organisms is a dichotomous key, the number of organisms in a group change from the first step to the last step of a dichotomous key as the no. of organisms increases and forms several groups of species and genus.

<h3>What is the use of the dichotomous key?</h3>

The use of dichotomous keys are :

  • contrasting characters
  • dividing organisms
  • eliminating .

Hence concluded that the dichotomous key has a number of organisms increases because the number of common characteristics of the organisms in a group increases.

To learn more about dichotomous keys refer to the link :

brainly.com/question/1281957

4 0
2 years ago
Human movement behaviour
azamat

Answer: i really dont know

Explanation:

im sorry im just trying to get questions

8 0
3 years ago
A geologist out in the field comes across the landform pictured here. She identifies it as having steep slopes, which give it a
krek1111 [17]

Plateau is an Area of Highland with Steep Slopes and is Relatively Flat on the Top.

The Type of Landform the Geologist came across is Plateau.

7 0
3 years ago
Read 2 more answers
What causes the northern and southern lights?​
DerKrebs [107]

Answer:

Earth's atmosphere is mostly made up of nitrogen and oxygen. Once the solar particles reach Earth's atmosphere, they collide with atoms of nitrogen and oxygen, stripping away their electrons to leave ions in excited states. These ions emit radiation at various wavelengths, creating the characteristic colors.

Explanation:

6 0
3 years ago
Read 2 more answers
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