parasite
parasitic
mimicry(camouflage): The stick caterpillar's vivid mimicry enlarged its chances of survival.
symbiosis
symbiotic
creature
organism
strain
species
vital
ripe(mature, ready): We describe plants as “ripe”, and animals as “mature”.
evolve(develop, grow): Modern turtles evolved from a very large, prehistoric species of turtle.
evolutionary
Darwinism
extinct
extinction: What caused the extinction of dinosaurs?
breed(raise, species, strain): The housewife has been breeding chickens for years.
reproduction(multiplication): Don't get yourself cheated. The vase is only a reproduction.
proliferate(multiply, increase): Autumn is the best season for crab to proliferate.
propagate(multiply, proliferate): Missionaries went far afield to propagate their faith.
subsist(live, survive)The poor farmer's family subsisted on potatoes.
exist(survive): We wish our love will exist forever.
posterity(offspring, descendant)
fermentation: During fermentation, yeast emits a distinctive smell.
respiration(breathing)
stodgy
secrete(discharge, release): The stomach begins to secrete a certain type of enzyme when food reaches it.
secretion
assimilate(absorb, integrate, incorporate): I have not quite assimilated the new rules so I sometimes violate them by mistake.
immune(unaffected, unsusceptible): I had the mumps when I was six, so now I am immune.
immunity
metabolism: Lazy people with slow metabolism tend to gain weight.
morphology
microscope
calorie
carbohydrate
glucose
protein
organ