Which statement describes thylakoids?
a)glucose is formed here.
b)water molecules are formed here.
c)only photosystem ii functions here.
d)photosystems i and ii function here.

The answer is D. The thylakoid has two main parts; grana and stroma. It is in the thylakoid that light reaction (that is photophosphorylation). In light reaction, photosystem I and II systems can be found in plants and cyanobacteria.  These systems harness the energy of the sun using coupling protein complexes (in an electron transport chain)  in photosynthesis.

D)Photosystems I and II function here.

Explanation:

d. in sexual reproduction, offspring have more chromosomes than

either parent.

asexual reproduction results in offspring which are genetically the same as the parent organism (not counting a rare mutation). sexual reproduction produces a random mixture of the genetics derived from both parents

explanation:

the  frequency of a wave represents  the number of wavelengths that pass a specific point per second. the unit for  frequency  is hertz (hz).

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