What could be an adaptation of xerophytes?

a. stomata only in the lower epidermis

b. extensive root system

c. large surface area of leaves

d. photosynthesis without light-dependent metabolism

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).

a) carbon, hydrogen

b) carbon, hydrogen, oxygen, nitrogen

c) carbon, hydrogen, oxygen, nitrogen, phosphorus

d) sugar

e) amino acid

f) nucleotide

i would think a oil tanker that has leaked in a bay