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madam [21]
3 years ago
15

Can you help me please

Biology
2 answers:
Nataly [62]3 years ago
6 0
I think it’s b because it’s the only one that makes more sense than the rest
Virty [35]3 years ago
3 0

Answer:

I think it's b because the earth's magnetic field had drastically changed shape and direction in the shape

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C₄ plants differ from C₃ and CAM plants in that C₄ plants _____. a. transfer fixed carbon dioxide to cells in which the Calvin c
lana [24]

Answer:

The correct answer is -transfer fixed carbon dioxide to cells in which the Calvin cycle occurs

Explanation:

In C4 plants the light reaction and Calvin cycle occurs in two different cell that are mesophyll cell and bundle sheath cells. First, the CO₂ is fixed into 4- carbon oxaloacetate by an enzyme PEP carboxylase.  

Then this oxaloacetate is converted into a simpler form called malate. Malate molecule then enters into bundle sheet cell and there it releases one molecule of CO₂. This CO₂ enters the Calvin cycle which results in the sugar formation with the help of enzyme rubisco.

Therefore by releasing of CO₂ molecule by malate in bundle sheet cells, it transfer fixed carbon for the Calvin cycle to occur.

5 0
3 years ago
What part of the human body is most similar in function to the spongy mesophyll layer in a leaf?
Whitepunk [10]
The part of the Human body that is most similar in function to the spongy mesophyll layer in a leaf is A) Alveoli in the lungs.
7 0
3 years ago
Parkinson disease is associated with demyelination of CNS neurons. a pyramidal nerve tract lesion. insufficient production of ac
Pepsi [2]

Answer:

The correct option is: <em>a deficiency of dopamine in the substantia nigra.</em>

Explanation:

The substantia nigra is the principal site involved in the physiopathology of Parkinson´s disease.

Cells from this area degenerate and die progressively causing important degeneration in the central nervous system. The cells that die -with no known reason- are those that produce dopamine and proportionate dopaminergic innervation to the encephalon. In fact, almost all the symptoms exhibited by patients with the disease can be explained by the lack of dopamine in the substantia nigra.  

This area uses the neurotransmitter to communicate neurons from the base ganglia. Ganglia are responsible of modulating and modifying movements.

The nigrostriatal system participates in planning and automatic execution of learned movements. When the ganglia activity decreases, so it does the amount and velocity of movements, something typical of the disease.  

3 0
3 years ago
What type of molecule can easily diffuse through the plasma membrane without any help? Why?
babunello [35]
Water diffusion is called osmosis. Oxygen is a small molecule and it's nonpolar, so it easily passes through a cell membrane. Carbon dioxide, the byproduct of cell respiration, is small enough to readily diffuse out of a cell. Small uncharged lipid molecules can pass through the lipid innards of the membrane.
7 0
3 years ago
Carbon dioxide, Co2, contains carbon, yet it is considered to be inorganic. Explain.
scoray [572]
CO2 is considered organic because it doesn’t contain a hydrogen. Organic compounds must contain carbon bound to hydrogen and possibly other elements.
8 0
3 years ago
Read 2 more answers
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