The fluidity of the cell membrane is maintained by
A. the absence of double bonds in the bilayer.
B. the presence of double bonds in the bilayer.
C. the non-polarity of the bilayer.
D. transmembrane proteins.

Could someone me with number one you

What is the relationship between absorbance of light and the rate of photosynthesis?

Aparent with freckles is crossed with a parent without freckles. the punnett square shows the possible genotypes and phenotypes of the offspring. which statement accurately describes the probability of phenotypes? a.the offspring are more likely to have freckles. b.the offspring are more likely to have no freckles. c.the likelihood of the offspring having freckles and not having freckles is the same. d.the likelihood of the offspring having freckles and not having freckles cannot be determined.