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3 years ago

What is so special about nitrogen in the atmosphere

Biology

1 answer:

HACTEHA [7]3 years ago

5 0

Answer:

Firstly, the partial pressure of nitrogen (78%) is crucial to breathing purposes. Without this pressure, the lungs will burst and animals cannot survive.

Secondly, nitrogen is required for the formation of amino acids (building blocks of proteins) and other organic compounds that are necessary for the survival of living organisms. Principally, in the atmosphere, nitrogen is present in the form of molecular nitrogen (N2). N2 is fixed by nitrogen-fixing bacteria that form nitrates and nitrites. These molecules are then used in biochemical processes to produce proteins (amino acids) and other organic compounds. In the absence of nitrogen, these processes could become seize of limited significantly thus affecting life overall.

Thirdly, nitrogen and its derivatives act as greenhouse gases that maintain the Earth's temperature within a range that supports life. Yes, the increased abundance of nitrous oxides is not good because of acid rain and other issues, however, still, the presence of nitrogen is important for life on this planet.

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What is difference between Microtubules and Microflaments?

Nina [5.8K]

Microfilaments

Microfilaments are fine, thread-like protein fibers, 3-6 nm in diameter. They are composed predominantly of a contractile protein called actin, which is the most abundant cellular protein. Microfilaments' association with the protein myosin is responsible for muscle contraction. Microfilaments can also carry out cellular movements including gliding, contraction, and cytokinesis.

Microtubules

Microtubules are cylindrical tubes, 20-25 nm in diameter. They are composed of subunits of the protein tubulin--these subunits are termed alpha and beta. Microtubules act as a scaffold to determine cell shape, and provide a set of "tracks" for cell organelles and vesicles to move on. Microtubules also form the spindle fibers for separating chromosomes during mitosis. When arranged in geometric patterns inside flagella and cilia, they are used for locomotion.

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5 0

3 years ago

Body tissue that is connected to and moves the bones in the body tendon 2. the ability of a muscle to move a weight repeatedly,

Misha Larkins [42]

The body strong flexible tissue attaching the muscle to the bone - Tendon
When a muscle is able to move a weight rapidly, repeatedly, and for an extended period of time - Muscle Endurance
When the muscle decreases in size and strength - Atrophy
When the skeletal muscle are forcefully exercised and in result enlarge - Hypertrophy

4 0

3 years ago

Which of the following best describes a tissue?

maksim [4K]

Answer:

A group of similar cells that serve the same purpose.

Explanation:

a group of the same cells makes a tissue.

7 0

3 years ago

Read 2 more answers

Please help please no silly answers

allsm [11]

Answer:

Explanation:

3 0

3 years ago

Read 2 more answers

DRY MASS OF CORN SEEDLINGS GROWN UNDER DIFFERENT CONDITIONS

PIT_PIT [208]

Answer:

See the answer below

Explanation:

(a) One of the inorganic sources of new plant mass for the light-grown plants is the atmosphere. The carbon in the form of carbon dioxide in the atmosphere is sequestrated into the body of the light-grown plants through a process known as photosynthesis. During this process, the inorganic carbon dioxide becomes fixed into the body of the plant through a series of steps that include both light-dependent and light-independent. The overall equation of the process is as below:

$6CO_2 + 6H_2O + Light --> C_6H_1_2O_6 + 6O_2$

As more plant mass is being gained by photosynthesis, some of the gained mass is also being lost to energy generation through a process known as respiration. Respiration is like the complete opposite of photosynthesis but a gain in mass is still possible because the rate of photosynthesis is more than the rate of respiration in the light-grown plants.

(b) The chemical reaction that can be held responsible for the decrease in mass of the dark-grown plants is respiration. Some of the mass is lost to energy generation and this mass cannot be recouped by adequate photosynthesis due to light limitation. The energy is needed to metabolic processes that would keep the plants alive. The equation of respiration is as below:

$C_6H_1_2O_6 + 6O_2 --> 6CO_2 + 6H_2O + Energy$

6 0

3 years ago