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3 years ago

1.

1 answer:

7 0

1. The answer is "the energy required to start the reaction".

This energy is called as activation energy of the reaction. If the activation energy is high, reaction is slow. Enzymes help to carry out the reaction by a new path by reducing the activation energy. But the energy of reactants and the products remain as same as without enzyme.

2. The answer is "reaction in cells would be too slow to sustain life".

If the activation energy is very high for the reaction, then that reaction will be very slow and will require more time to complete the reaction. Then survival is very low. Hence, the roll of enzymes is very important to sustain life.

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What is the difference between plants and animal cells

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3 years ago

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The answer is D. One year

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Why does our heart need two parts that are completely separate from one another?

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Answer:

the heart is separated into two sides so that it can carry out its function well. The right heart contains deoxygenated blood and the left heart with oxygenated blood. the two sides are separated from each other so that the blood from the two sides don't get mixed. this leads to effective oxygenation of the deoxygenated blood in the right heart through pulmonary circulation and effective oxygenation of the tissues in the different parts of the body by the oxygenated blood of the left heart through systemic circulation.

Explanation:

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2 years ago

Match the layer of the atmosphere with its correct characteristic.

aleksandrvk [35]

Ansswer:

Exosphere has no upper boundary, as it separates the other layers from space.

Thermosphere has energy from the sun that causes gas particles to become ions.

Mesosphere consists of gases that mix together as they drive global air circulation.

Stratosphere has a dry layer with few clouds and very dry air.

Troposphere is a dense layer containing breathable air and clouds in the sky.

Explanation:

Just took the test and got 100!

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2 years ago

**Urgent** Need help fast

Bess [88]

Answer:

For the first box (top left one), it is AA

For the second box (top right one), it is Aa

For the third one (bottom left one), it is aA

For the fourth one (bottom right one), it is aa

This one above ^^^ is the top line of the punnet square (the small line)

A = free-hanging earlobes

a = attached earlobes

For the first box (top left one), it is free-hanging earlobes (both "A"s are dominants, and the dominant is greater than the recessive one).

For the second box (top right one), it is free-hanging earlobes (there is at least one dominant A so it will be greater than the other "a" although there is a chance for it to be an attached earlobe, but in this case, it isn't)

For the third one (bottom left one), it is free-hanging earlobes (again, there is at least one dominant A so it will be greater than the other "a" even though, there is a chance for it to be an attached earlobe, but in this case, it isn't)

For the fourth one (bottom right one), it is attached earlobes (both "a"s are recessive, there is not one dominant "a" which means that it will be an attached earlobe".

This one above is ^^^ is for the second line in the punnet square (the longest line) P.S you dont have to write the explanation you can just write if it's an attached earlobe or a free-hanging one

The ratio will be 75% to 25%. The 75% will be the offsprings inheriting the free-hanging earlobes, and the 25% will be the offsprings inheriting the attached earlobe. It is most likely that the offspring will inherit the trait for free-hanging earlobe since it is the dominant allele there is.

Hope this helped!

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3 years ago