Natural Selection - Half Term 2 (9Ad, 9Ae) Flashcards

1
Q

What is natural selection?

A

When organisms better suited to their environment are more likely to survive and reproduce.

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2
Q

What is evolution?

A

Natural selection happening over a long period of time

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3
Q

What can cause species to become endangered or extinct?

A

Changes in an ecosystem

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4
Q

What are some examples of changes in an environment that can cause species to become endangered or extinct?

A
  • changes in physical environmental factors
  • competition from other species
  • disease
  • human actviities
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5
Q

How can we stop species from becoming endangered or extinct?

A
  • protecting areas and setting up nature reserves
  • setting up breeding programmes in zoos
  • banning the hunting of some animals or the collecting of wild plants
  • setting up gene banks to store parts of organisms such as seeds and gametes
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6
Q

Why should we preserve biodiversity?

A
  • organisms depend on on eanother (scientific word: interdependent)
  • we won’t be able to make use of organisms if they become extinct (selfish, no? i hate humans)
  • more biodiverse areas recover better from natural disatststers
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7
Q

What is adaptation?

A

The features that something has to enable it to do a certain job or survive in a particular place

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8
Q

What is biodiversity?

A

The range of different species of organisms in an area

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9
Q

What is competition?

A

There is competition between organisms that need the same organisms as each other. We say that they ‘compete’ for these resources

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10
Q

What is an ecosystem?

A

All the physical environmental factors and all the organisms that are found in a habitat

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11
Q

What does endangered mean?

A

When a type of organism is in danger of ceasing to exist

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12
Q

What does extinct mean?

A

An organism that no longer exists (alive) is extinct

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13
Q

What is a food web?

A

Many food chains linked togteher, showing the flow of energy through organisms in a habitat

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14
Q

What is a gene bank?

A

Any facility that stores genetic material from different organisms (e.g. seeds, gametes, tissue samples)

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15
Q

What does native mean?

A

Naturally found in a certain area (obviously please tell me you know this)

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16
Q

What is evolution?

A

A change in one or more characteristics of a population over a long period of time

17
Q

Good luck w Bio

A

Thank you that’s so sweet :))))

(If you said anything else, get off my flashcards and LOCK YOUR DOORS AND WINDOWS)