Food Webs and Ecological Pyramids 2.5

Question 1

Ecological Niches

Answer 1

The function a species serves in an ecosystem, including what is eats and how it behaves.

Question 2

example of ecological niches

Answer 2

the niche of a black bear: black bears feed on nuts and berries. They may carry the seeds quite a long distance before the they digest and expel the seeds in a new area where they may germinate. Bears hibernate during the winter. Bears are often host to a variety of parasites and feeding insects

Question 3

Types of Consumers

Answer 3

herbivore
carnivore
omnivore
scavenger

Question 4

herbivore

Answer 4

animal that eats plants or other producers

Question 5

carnivore

Answer 5

animal that eats other animals

Question 6

omnivore

Answer 6

animal that eats both plants and animals

Question 7

scavenger

Answer 7

animal that feeds on the remains of another organism

Question 8

Food chains

Answer 8

display feeding relationships between species

and

how energy is transferred from one organism to another

Question 9

Trophic level

Answer 9

refers to the level of an organism in an ecosystem depending on its feeding position along a food chain

Question 10

producer - tropic level

Answer 10

(first trophic level) –
an organism that can make its own food.

Question 11

Primary consumers - tropic level

Answer 11

(second trophic level) –
herbivores

Question 12

Secondary consumers - tropic level

Answer 12

(third trophic level) –
omnivores/small carnivores

Question 13

Tertiary consumers - tropic level

Answer 13

(fourth trophic level) –
larger carnivores

Question 14

Scavengers - tropic level

Answer 14

(any level) –
feeds on the remains of other organisms

Question 15

food chains do not really exist in nature. The real relationships between species are always much more complex.

Answer 15

TRUE

Question 16

A more accurate way to show these relationships is with a ___________ which shows a series of interconnecting food chains in a community

Answer 16

food web

Question 17

Ecological Pyramids

Answer 17

Show the relationships between the trophic levels in ecosystems (the amount of energy, numbers or biomass)

Question 18

The atmosphere contains over _____

Answer 18

80% nitrogen

Question 19

The atmosphere contains over 80% nitrogen, but neither plants nor animals can use it. what are two ways that atmospheric nitrogen is converted to a form that is useful for plants and animals.

Answer 19

for plants - (N2) atmospheric oxygen

for animals - (through eatting plants)