mutation that takes place in the cells as a result of chemical reactions taking place naturally without exposure to any external agent

reproductive sac that contains spores

haploid cell that can produce a haploid multicellular organism or can fuse with another spore to form a diploid cell

a haploid cell that can undergo mitosis to form a multicellular, haploid individual

diploid cell that produces spores by meiosis

a multicellular diploid life-cycle stage that produces haploid spores by meiosis

multicellular diploid stage in plants that is formed after the fusion of male and female gametes

clade of lizards and snakes

type of epithelia made of flat cells, specialized in aiding diffusion or preventing abrasion

selection that favors average phenotypes

structure that contains the male reproductive organs

metabolic rate at rest in ectothermic animals

(also, stirrup) third of the three bones of the middle ear

storage carbohydrate in plants.

AUG (or rarely, GUG) on an mRNA from which translation begins; always specifies methionine