BIOLOGY MIDDLE SCHOOL

Why is the human brain grey?

Answers

Answer 1
Answer: There is no pigment in the brain, so it is in it's natural colour, grey.
Answer 2
Answer: The human brain is grey because it has no pigment, which gives things color.

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What is important in helping living things survive.Explain why living things need nitrogen.

Answers

Nitrogen makes up part of the proteins and DNA in our and other organisms cells. 
Sunlight.
Living things need nitrogen because it forms a part of the proteins and DNA that are found in cells. Animals get nitrogen from eating plants and other animals and just like animals, plants require nitrogen to grow and survive.

Carbon Dioxide enters plants through their _ _ _ _ _ _ _

Answers

Carbon Dioxide, which is the 'oxygen' that plants need, enters the plant through its stomata.

Thank you!

What organic matter contains stored energy?? (12)

Answers

Biomass it the organic matter that contains stored energy

How do bases bond together

Answers

a bonds with t g bonds with c t bonds with a c bonds with g

In which way will energy be used after it leaves the mitochondrion during cellular respiration?

Answers

Answer:

With the help of cellular respiration, the mitochondria produced energy-rich compound ATP (adenosine triphosphate).

The ATP molecule holds the energy in the form of its phosphate bonds.

This energy is released by hydrolysis of ATP which results in the formation of ADP (adenosine diphosphate).

Sometimes, the ADP is further hydrolyzed to produce more energy. It results in the production of AMP (adenosine monophosphate).

The energy released from ATP hydrolysis is in the form of heat which is coupled with all the cellular activities like cellular transportation, repair, replication, apoptosis et cetera.

Does your body get all its energy from the sun?

Answers

Yes, because all energy comes from the sun (not directly) through food.
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What is a solid formed from liquid reactants during a chemical reactions.
Two test tubes are filled with a solution of bromthymol blue. A student exhales through a straw into each tube, and the bromthymol blue turns yellow. An aquatic green plant is placed in each tube, and the tubes are corked. One tube is placed in the dark, and the other tube is placed in direct sunlight. The yellow solution in the tube in sunlight turns blue, while the one in the dark remains yellow. Which statement best explains why the solution in the tube placed in sunlight returns to a blue color?Question 11 options:Oxygen was produced by photosynthesis.Oxygen was removed by respiration.Carbon dioxide was removed by photosynthesis.Carbon dioxide was produced by respiration.
What characteristics are common in angiosperms