Food Webs and Dinosaurs Flashcards

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0
Q

When did they first appear in the fossil record?

A

250-300 mya

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1
Q

What does the term dinosaur mean and refer to?

A

Terrible Lizard, and refers to a small group of organisms.

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2
Q

What are dinosaurs who only eat plants called?

A

Herbivores

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3
Q

What are dinosaurs who only eat meat called?

A

Carnivores

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4
Q

What are dinosaurs who eat both meat and plants called?

A

Omnivores

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5
Q

What is a food chain?

A

A sequence of who eats who in a biological community to obtain nutrition

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6
Q

What does the food chain start with?

A

Normally the sun

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7
Q

What is the primary producer in a food chain?

A

A plant that uses photosynthesis as nutrition.

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8
Q

What are the organisms that eat the primary producers called?

A

Primary consumers

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9
Q

What are the animals that eat the primary consumers called?

A

Secondary consumers

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10
Q

These animals are then eaten by even larger consumers, called what?

A

Tertiary consumers

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11
Q

What are tertiary consumers eaten by?

A

Quaternary consumers, or the top predator.

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12
Q

Which section of the food chain has no enemies?

A

The top predator.

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13
Q

In the dinosaur world what would have been the top predator?

A

T-Rex

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14
Q

What do the arrows in a food chain show?

A

The flow of energy

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15
Q

How much energy is lost at each step and why?

A

90%, and because of having to carry out the seven life processes.

16
Q

What is the trophic level of an organism?

A

The position it holds in a food chain

17
Q

What is a network of many food chains called

A

A food web

18
Q

The number of organisms at each trophic level tends to decrease, why?

A

Because there is not enough energy to support large number of these higher consumers.

19
Q

What could be the primary producer in a pyramid of numbers that isn’t shaped like a pyramid?

A

Oak trees