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Flashcards in KEY DEFINITIONS Deck (13):
1

What is diffusion?

Diffusion is the spreading out of particles from an area of high concentration to an area of low concentration.

2

What are guard cells?

Cells which open and close the stomata (pores) in a leaf.

3

What is a tissue?

a tissue is a group of similar cells that work together to carry out a particular function.

4

What is muscular tissue?

a type of tissue which contracts to move whatever it's attached to.

5

What is glandular tissue?

a type of tissue which makes and secretes chemicals like enzymes and hormones.

6

What is epithelial tissue?

a type of tissue which covers some part of the body

7

What is photosynthesis?

process that produces glucose in plants and algae.

carbon dioxide + water---> glucose +oxygen

8

What is a catalyst?

a substance which speeds up a reaction without being changed or used up in the reaction.

9

What is respiration?

The process of releasing energy from glucose which goes on in every cell.

10

What are daughter cells?

are genetically identical cells formed from a cell division

11

What is extinction?

When a species is wiped out due to organisms not being able to evolve quickly enough.

12

What is speciation?

development of a new species.

13

What is a species?

a group of similar organisms that can reproduce to give fertile offspring.