Answer:
E
Explanation:
Phytochrome is an important pigment that regulates photomorphogenic aspects of plant growth and development such as seed germination, stem elongation, leaf expansion, formation of certain pigments, chloroplast development and flowering.
Phytochrome has two different chemical structures that are inter-convertible. The forms are named by the color of light they absorb maximally: Pr is a blue form that absorbs red light strongly (660nm) and Pfr is a blue-collar form that absorbs far-red light strongly (730nm). When each phytochrome form absorbs its respective photon, they change chemically into their complementary form.
N.B: In plants, Pfr is the physiologically active or signalling state.
In the dark, phytochrome is in the Pr (inactive) form because at night, Pfr slowly converts back to Pr (inactive form).
The biologically inactive form of phytochrome (Pr) is converted to the biologically active form (Pfr) under illumination with red light. Far-red light and darkness converts the molecule (Pfr) back to the inactive form. Although, it converts back to Pr, slowly in darkness
Answer:
To keep blood safe, blood banks carefully screen donated blood. The risk of catching a virus from a blood transfusion is low. Sometimes it is possible to have a transfusion of your own blood. During surgery, you may need a blood transfusion because of blood loss.
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Explanation:
O receptor de dor indica que algo está tocando a pele de maneira agressiva e prejudicial ao corpo.
Answer:
hcl is present to clean other harmful acids
A. speed. This is because it classifies the speeds into six different categories