The roots growing down is an example of A. positive geotropism
B. negative geotropism
C. Phototropism
D. Thigmotropism​

This is one form of rna that transports a specific amino acid to a ribosome during protein synthesis.

All individuals have two alleles for a given trait. according to mendel's these alleles are passed down one each from both mother and father.

Which mechanism of transport takes place when solute particles move from a region of high concentration to a region of low concentration? active diffusion isotonic osmosis