Proteins are made up of a chain of 20 amino acids
Estrogen and testosterone are non polar in nature.They can easily pass the cell mambrane which is made up of lipid bilayer.After entering the cell they bind to their intracellular receptors present in the cytoplasm.
The receptor hormone complex moves to the nucleus and perform transcription and later on translation of desired proteins.
Estrogen helps in the functioning of reproductive system as it supports growth and differentiation.Whereas testosterone is important for sertoli cells which help in the process of spermatogenesis i.e formation of sperm.
The answer, though i'm not quite sure' should be sulphate aerosols, though i think that is actually what the clouds are made out of. So the answer might be instead just stratospheric ash clouds
I think it is A. both plant and animal cells use some of their vacuoles to store food.
You can conclude that organisms B and C are more closely related than they are to organism A.
