英和和英

a parasite

a living thing on which a parasite depends for its food, called host

an order of protoctist

organic life

an animal that is hunted and eaten by another animal

life of a creature

a rare species

low forms of life

any genus of Protoctista

a group of plants or animals that share the same surroundings

proterozoic life forms

a genus of protoctist

the abdominal region of a living organism

an imaginary creature

a living thing which is classified under the insects and worms category

to vivisect

within a living organism

There are many froms of life.

to cause a species to become extinct

degenerate forms of life

a living thing

a family of protoctist

a single organism

(of a living thing) to die

method of taking nourishment, called saprophytism

in the living organism

an organism that lives only in the presence of oxygen, called aerobe

of a species of creatures, to become extinct

respiration

an extraterrestrial