Unit 4

survive

to continue to live in spite of danger

commercial

concerned with earning money

species

a group of animals or plants whose members share common characteristics

diverse

very different from each other and of various kinds

reduce

to make something less or smaller in size, quantity, price, etc.; to become less or smaller in size, quantity, etc.

estimate

​to form an idea of the cost, size, value etc. of something, but without calculating it exactly

restore

to bring back a situation or feeling that existed before

doubled

to become, or make something become, twice as much or as many

stable

fixed or steady; not likely to move, change or fail

quantity

an amount or a number of something

reproduce

produce offspring that are similar to the parents; have babies

predators

Eat weak animals

prey

Which is eaten by predator

biodiversity

​the existence of a large number of different kinds of animals and plants which make a balanced environment

peak

the point when somebody/something is best, most successful, strongest, etc.

x-axis

the horizontal line on a graph

y-axis

the vertical line on a graph

breed

to keep animals or plants in order to produce young ones for a particular purpose; or to have sex and make babies

hatchling

​a baby animal that has just come out of its egg

captivity

the state of being kept as a prisoner or in a space that you cannot escape from

declining

becoming less

definitely

for sure without question and beyond doubt

individual

a person considered separately rather than as part of a group

essential

absolutely necessary or extremely important

informed

having or showing knowledge of a particular subject or situation

rely on

to depend on

impact

the powerful effect that something has on somebody/something

severe

very bad or serious

vital

essential, necessary or essential in order for something to succeed or exist

dedicate

to give a lot of your time and effort to a particular activity or purpose because you think it is important

harvest

the time of year when the crops are gathered in on a farm, etc.; the act of cutting and gathering crops

agriculture

​the science or practice of farming

aquaculture

the practice of growing plants in water or farming fish for food

carnivore

any animal that eats meat

herbivore

any animal that eats only plants

omnivore

​an animal or a person that eats all types of food, especially both plants and meat