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Nimfa-mama [501]
3 years ago
7

2. If nearly 79% of the atmosphere is made of nitrogen, how could there be a shortage of nitrogen in soil?

Biology
1 answer:
Margaret [11]3 years ago
3 0
Nitrogen must be converted into nitrates before organisms can use it. If soil lacks nitrogen fixing bacteria, then it has few nitrates for the plants to take in.
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During photosynthesis, the energy used to pump protons comes from ___________, whereas in cellular respiration it comes from ___
Annette [7]

During photosynthesis, the energy used to pump protons comes from ______light_____, whereas in cellular respiration it comes from ______NADH/FADH₂_______.

<h3>What are the steps in photosynthesis?</h3>
  1. The first step in photosynthesis is the absorption of light by chlorophyll bound to chloroplast thylakoid proteins. The absorbed light energy is used to remove electrons from electron donors such as water to form oxygen.
  2. The electrons are then transferred to the primary electron acceptor, quinine (Q.). Electrons are further transferred from the primary electron acceptor to the final electron acceptor (usually NADP⁺).
  3. Proton transfer from the thylakoid lumen to the stroma via the F₀F₁ complex generates ATP from ADP and Pi.
  4. The NADP and ATP produced in steps 2 and 3 provide the energy, and the electrons power the process of reducing the carbon to a six-carbon sugar molecule.

The first three steps of photosynthesis, are directly dependent on light energy and are thus, called light reactions, while the reactions in the last step are independent of light and thus are termed dark reactions.

To know more about photosynthesis visit:

brainly.com/question/1388366

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5 0
1 year ago
[Please help me with this question and please explain WHY you chose what you chose] The diagram shows a plant and an animal cell
Free_Kalibri [48]

Answer:

B. Both cells use the same molecules for energy

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New inheritable characteristics would least<br> likely result from
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Mutations that occur in muscle and skin cells

Explanation:

3 0
3 years ago
When bonds are broken, energy is released.<br> True or false
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False. <span>Breaking Bonds → Energy Absorbed
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You have to put energy into a molecule to break its chemical bonds. The amount needed is called the<span> bond energy</span><span>. If you think about it, molecules don't spontaneously break.
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Positive feedback is a control system that sends a signal to ( increase) a response.
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