KEY DEFINITIONS Flashcards

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1
Q

What is diffusion?

A

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

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2
Q

What are guard cells?

A

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

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3
Q

What is a tissue?

A

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

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4
Q

What is muscular tissue?

A

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

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5
Q

What is glandular tissue?

A

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

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6
Q

What is epithelial tissue?

A

a type of tissue which covers some part of the body

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7
Q

What is photosynthesis?

A

process that produces glucose in plants and algae.

carbon dioxide + water—> glucose +oxygen

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8
Q

What is a catalyst?

A

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

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9
Q

What is respiration?

A

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

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10
Q

What are daughter cells?

A

are genetically identical cells formed from a cell division

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11
Q

What is extinction?

A

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

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12
Q

What is speciation?

A

development of a new species.

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13
Q

What is a species?

A

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

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