the natural home or environment of an animal, plant, or other organism

a random error in gene replication that leads to a change

to give sth to sb else, especially after receiving it or using it yourself

a group of people born and living during the same time

marked with many small spots

make or become black

related to the production of goods

to cause continual trouble or distress

someone or something that has the same job or purpose as another

the act of noticing or finding sth

beneficial for

used to emphasize how small or insignificant someone or something is

take action to achieve a particular purpose

try to discover more facts about how sth functions

to disagree with something, especially by saying that the opposite is true

to emit; to produce sth such as heat or a smell

a pleasant smell

give something valuable to your children or grandchildren, usually when you die

not proud; modest

a long, thin and sharp point that grows out of a plant or animal

any organism that damages valuable crops

having a body temperature that stays the same and does not change with the temperature of the environment

cold-blooded animals can only control their body heat by taking in heat from the outside or by being very active

1) strong and difficult to break 2) strict

a creature that doesn't have a spine

divided into parts

bite repeatedly

an animal that eats only plants and grasses

an animal such as a snake or a lizard that lays eggs and is cold-blooded

an animal that feeds on both plants and meat

an animal that eats other animals

a type of animal that keeps its young in a pouch

a small animal with sharp teeth

a creature that lives in both water and on land

a mammal with a highly developed brain and hands

a creature with a spinal cord and bony skeleton

to make or become bright or brighter; to lighten; to cheer and encourage

to become wider or more general

to become stronger

to make something slightly wet

to make the effect of something seem less unpleasant or severe, or to become less unpleasant or severe

to deal with a problem or difficult situation

to become thicker

to control more strictly

to make laws or rules stricter

to make sth wider

an official rule or the act of controlling something

make something calmer or less painful

to completely cover something, usually in order to protect it

to surround or form a circle around

to make people obey a rule or law

to make something bigger

to imagine; to foresee

to include a full range of; to contain

a place where animals and plants live and are protected

to provide a place or room for sb to stay/live in; to cater to sb's needs