Which molecule makes up the rails or side of the DNA structure

How does genetic engineering impact biodiversity?

A plant grows in soil contaminated with toxins. Through which structure word the toxins first enter the plant? A. Paramecium B. Chloroplasts C. Phloem D. Xylem

Organisms become a mature adult through this process

I can grow my body back in about two days if cut in half. many scientists believe i do not undergo senescence. what am i?

If I were to drop a needle on top of a bowl of water would it sink

How many chromosomes do humans have?

Pairing of homologous chromosomes in prophase of meiosis I appears to be critical for proper alignment, crossing over, and subsequent separation. This pairing is facilitated by the sharing of sequence homology between homologous chromosomes.

What does "leeward" mean?

Which lipid acts as a chemical messenger? a. adipose tissue b. cholesterol c. testosterone d. beeswax

The degradation of alanine yields pyruvate and the degradation of leucine yields acetyl coa. can the degradation of each of these amino acids directly replenish the pool of tca intermediates? explain why or why not.