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Biodiversity > Biodiversity > Flashcards

Biodiversity Flashcards

1
Q

Biodiversity

A

The variety of plant and animal life in the world or particular habitat

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2
Q

Habitat

A

The place where an organism lives

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3
Q

Community

A

All the species found in a habitat

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4
Q

Name four things animals compete for ?

A
  1. Food
  2. Water
  3. Space - to hunt and shelter
  4. Mates - to reproduce
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5
Q

Name four things plants compete for ?

A

1.Light
2. Water
3. Space
4. Minerals

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6
Q

Explain 3 adaptations that a camel has to help it survive in the desert

A
  1. Hump - store fat for energy
  2. Eyes & Nostrils - keep out sand
  3. Feet - Wide, large feet so they don’t sink into the sand
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7
Q

Name the 4 scientists involved in producing the model of DNA

A

Rosalind Franklin & Maurice Wilkins

(Used X-rays to investigate the structure of DNA)

James Watson & Francis Crick

(Worked out that the structure of the DNA is a twisted double Helix

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8
Q

Variation

A

Differences in characteristics within a species

By inheritance or environmental factors

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9
Q

Who is Charles Darwin

A

He discovered the theory of evolution

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10
Q

State one piece of evidence that proves dinosaurs existed

A

Fossils

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11
Q

What is meant by extinction

A

No more individuals of a species are left anywhere in the world

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12
Q

Reasons an organism may become extinct

A

New predators
New disease
Destruction of habitat

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13
Q

Explain predator-prey Relationships

A

Prey populations increase predator populations. The increase in predator populations means prey populations decrease

The decrease of prey populations mean predator populations decrease. When predator populations decrease prey populations can increase and the cycle begins again.

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14
Q

What is DNA

A

DNA is a double stranded helix held together by complementary base pairs

Adenine & Thymine

cytosine & Guanine

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15
Q

What are food chains & Food Webs

A

Feeding relationships between organisms

Energy transfer from one organism to another

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16
Q

Interdependence

A

When organisms depend on each other for something

17
Q

What does the arrow on a food chain show

A

Arrows show the transfer of energy

18
Q

Chemosynthesis

A

Where bacteria use energy released by chemical reactions to make glucose

19
Q

Explain the effect changing one animal in a food chain has on the other animals

A

If rabbits decreased….

Foxes have fewer rabbits to eat

If insects decrease….

Frogs, voles & thrushes would decrease as there is less food

20
Q

Explain what the arrows in a food chain represent

A

Arrows represent the direction of energy transferring from one organism to another

Biodiversity (1 decks)

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