Biology

Lice in the human hair

Mistletoe on citus fruit.

Egret on cow

Fern on palm tree

particular species of plants and animals

the interrelationship between orgganisms and their environment

the properties of a habitat

the interrelationship between plants and animals

population density

carrying capacity

population growth

maximum population

birds

phytoplankton

zooplankton

fishes

has more pronounced webbed digits

has much longer and stronger hind limbs

lives in water most of the time

is more streamlined than the toad