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Anna71 [15]
3 years ago
10

Hydrogen fuel is clean but not cost-effective. ???

Biology
1 answer:
Anna35 [415]3 years ago
5 0
If I am correct that this is a true of false statement, then this would be true, hydrogen fuel is clean but not cost-effective.
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Is the following an example of a. Negative feedback loop b. Positive feedback loop Hydrochloric acid and pepsin are enzymes secr
Finger [1]

Answer:  This is a positive feedback loop.

Explanation:

The protein digestion in the body is an example of the positive feedback. The gastric secretions is stimulated chiefly by the action of three chemicals.

These chemicals are acetylcholine, histamin and gastrin. These chemicals stimulate the parietal cells to secrete HCL and intrinsic factors.

The chief cells secrete pepsinogen in response to the gastrin and ACh. As the dietary proteins are digested, it breaks down the amino acids and peptides.

This stimulates the G cells of the stomach to secrete more gastrin. This is how the positive feedback loop for the protein digestion works.

5 0
3 years ago
How many gigatonnes of carbon are stored in each of the following locations?
leonid [27]

a)121 million gigatons or 121 million billion metric tons" of carbon).

B)The ocean, with around 38,000 gigatons

c)60 gigatons of carbon

3 0
3 years ago
How does DNA send it's instructions to the other parts of the cell?
Tatiana [17]

Answer:Through mRNA, the DNA is able to transmit its messages out to other parts of the cell. (Learn more about mRNA here.) Information from the DNA is coded into mRNA which leaves the nucleus of the cell DNA contains the instructions needed for an organism to develop, survive and reproduce. To carry out these functions, DNA sequences must be converted into messages that can be used to produce proteins, which are the complex molecules that do most of the work in our bodies (the white region) and is used by ribosomes (outlined in green). hope this helps have a great night ❤️❤️❤️

Explanation:

5 0
3 years ago
Which phrase best describes the main goal of a human community? O A. To meet needs through collective effort O B. To make and fo
valentina_108 [34]

Answer:

Hello There!!

Explanation:

I believe the answer is A. To meet needs through collective effort.

hope this helps,have a great day!!

~Pinky~

5 0
3 years ago
Can you guys please help me I have a test tomorrow
shtirl [24]

Answer:

11. b.

Explanation:

Photosynthesis stores energy in carbohydrates, cellular respiration releases energy from carbohydrates.

Glucose, C₆H₁₂O₆, is a carbohydrate.

Write out the equations:

<u>Photosynthesis</u>

carbon dioxide + water + light energy => oxygen + glucose/sugar

CO₂ + H₂O + light => O₂ + C₆H₁₂O₆

The carbohydrate is stored in the plant until it needs it, like to perform cellular respiration.

<u>Cellular Respiration</u>

oxygen + glucose/sugar => carbon dioxide + water + ATP energy

O₂ + C₆H₁₂O₆ => CO₂ + H₂O + ATP

The carbohydrate is used to make energy. Energy is released from carbohydrates.

Glucose, C₆H₁₂O₆, is a carbohydrate.

Fault in other options:

a. Photosynthesis and cellular respiration both occur in plants. Plants have mitochondria for cellular respiration.

c. Photosynthesis uses carbon dioxide and cellular respiration releases carbon dioxide.

d. Photosynthesis uses carbon dioxide, cellular respiration uses oxygen.

6 0
3 years ago
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