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3 years ago

Coal is a fuel before it is burnt A.chemical energy B.electric potential energy C.heat energy

Biology

1 answer:

olga nikolaevna [1]3 years ago

7 0

Answer:

a chemical energy

Explanation:

it releases more energy tgan what is needed

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Why do scientists usually try to work without making the animals aware that humans are present

FromTheMoon [43]

Answer:

In animal field studies, why do scientists usually try to work without making the animals aware that the humans are present? It is necessary to observe the animals without disturbing them. When a controlled experiment is not possible, why do scientists try to identify as many relevant variables as possible?

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3 years ago

Which of the following is not a natural cause of extinction?

dedylja [7]

Answer:

Introduction of Non-native species would be the answer. ( B )

Explanation:

Now let's break it down.

A. Competition due to overpopulation

Competition due to overpopulation, as competition of resources rises, species will fight among each other, and slowly, population will go down. But I don't see the reason of why it would cause an extinction... perhaps a decrease of population. See, once populations starts decreasing, resources will increase. And ONCE resources increase, populations starts increasing, and there goes competition. Resources decreases, populations decreases, and the whole process repeats. So I'm not quite sure whether it will cause extinction of a species.

B. Introduction of Non- native species.

So what does it mean by Non-native species?

It means that species that have no effect and doesn't exist in the ecosystem. So that will definitely not affect the population whatsoever.

C. Catastrophic Events

Well, common sense. Many people died of tsunamis, tornado and other natural disasters every year. Too many disasters can cause the population to cease.

D. Disease

This we can relate, especially the Coronavirus. Many humans died of the deadly virus. Same goes to animals. If a disease gets too deadly, population will decrease and drive the species to extinction.

So, the Answer would be B.

<h2>HOPE THIS ANSWER HELPED :)</h2>

3 0

3 years ago

4. During _____ both the contents of the nucleus and the cytoplasm are divided

mario62 [17]

The mitotic phase. It includes both mitosis and cytokinesis

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3 years ago

A contraceptive that permanently prevents transport of the sperm or egg to the site of conception is a

scZoUnD [109]

The answer is Surgical Contraceptive Methods e.g. Vasectomy(For males) and Tubectomy(Females)<span>.

</span>Vasectomy:- In this method vas deference is cutted and tied so that sperms can't reach uthera.

Tubectomy:- In this method both fallopian tubes are cut and tied, so that no egg can head towards the site of reproduction(Cervix).

Note:- Both process are irreversible.

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3 years ago

Of the following muscle types, which has the longest muscle cells and has obvious stripes called striations? Of the following mu

kumpel [21]

Answer:

Explanation: skeletal muscle

6 0

2 years ago

Read 2 more answers

Coal is a fuel before it is burnt A.chemical energy B.electric potential energy C.heat energy​

Coal is a fuel before it is burnt A.chemical energy B.electric potential energy C.heat energy