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3 years ago

Why is the quadrat method useful for estimating snail populations? Do you think it would work for fish populations?

1 answer:

5 0

Quadrat method is used for estimating the number of individuals in an area. In this method, a large square area on the ground or water surface is marked, call it an enclave. The number of animals present in this enclave is counted. Then by assuming that the animals are less migratory and are uniformly distributed, their number for a large area is estimated by the use of unitary method of calculation. Example a 4 square feet area has 2 snails, then a 1000 square feet area will have (1000 x 2)/4, i.e, 500 snails in it. Fishes can be counted using this method only if they are confined in a small water body like a lake or a pond. Rivers are flowing so the fishes may move along its length which can give us an underestimate or an overestimate of their numbers. Sea has its depth and huge area, and fishes can be moving randomly in it. Hence this method will not work for river and sea fishes.

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Animals are associated with ___and plants are associated with

Lady_Fox [76]

Answer:

Animals and plants are associated with both divisions and phyla

As kingdom grows the more species are in the classifying group.

And since there are only a number of kingdom and thousand species, it would account that species changes more rapidly and exponentially grows than kingdoms.

Explanation:

7 0

3 years ago

Nutrients enter the bloodstream during the process of

Elis [28]

The choice that best fits and answers the question is;

D: absorption

I hope this answer is sufficient and has aided you.

Cheers.

6 0

2 years ago

Could you use the dichotomous key in this section to identify a species of

Pepsi [2]

Answer:

Yes, the species of a lizard can be identified using dichotomous keys.

Explanation:

A dichotomous key is an identification tool used by the biologists especially taxonomists to identify and classify the organisms.

The dichotomous keys are based on the characteristic feature of an organism for which two which contains two contrasting feature. The dichotomous keys are the most common tools used to classify an organism.

A species of lizard can be identified using these keys by selecting the key characteristic feature shown by the species which could be quantitative like weight, height or it could be qualitative like colour. By comparing these characteristics, it becomes easy to identify the species.

5 0

3 years ago

Fermentation occurs if:

Otrada [13]

Answer:

When the muscle cells can't get oxygen fast enough to meet their energy needs through aerobic respiration.

Explanation:

That's all I can help u.

5 0

2 years ago

In humans, the pelvis and femur, or thigh bone, are involved in walking. In whales, the pelvis and femur shown i

Semenov [28]

The question is incomplete. The complete question is as following:

In humans, the pelvis and the femur, or thighbone, are involved in walking. In whales, the pelvis and femur shown in this figure represent...

Answer:

vestigial structures

Explanation:

A "vestigial structure" or "vestigial organ" are defined as the organs that no longer have any function in the organisms' body but had an important role in past.

<em>Pelvis and femur are thigh bones in humans which helps them in walking but in whale's pelvis and femur are considered as vestigial structures. </em>

The pelvis and femur in whales, are the inherited structure from ancestors and shows evidence for evolution on the basis of natural selection.

Hence, the correct answer is vestigial structures.

3 0

2 years ago