P700 is photosystem I. It includes chlorophyll a 670, 680, 695, 700, Chlorophyll b, carotenoids. The active reaction center of photosystem is p700, as it absorbs light of a wavelength longer than 680nm.
P680 or the photosystem II has the following pigments: chlorophyll b, 660, 670, 680, 695, 700, phycobilins, and xanthophylls. The active reaction center, in this case, is p680 of chlorophyll a, as it absorbs the light having a wavelength shorter than 680nm.
Answer:
A and D
Explanation:
Dolphins have a narrow, torpedo-shaped body to swim easily through water. Their strong, paddle-like flippers also aid in strong swimming.
However dolphins do not secrete gases or attach themselves to the bottom of the sea, so the answers are A and D.
Good luck ^^
A stem cell is an extraordinary, early stage, unspecified cell that has the potential to develop into a number of specialized cell types.
there important because they can replace cells that have been lost or damaged
D. Adaptations that improve the chances an individual will have a
long life but that may not affect reproduction become more
common within a population over time
The most abundant element in the atmosphere is Nitrogen.
This can also be found in beans and whey protein.
Hope this helps!
