science

Question 1

Example of variation in a species-

Answer 1

butterflies come in different colours

Question 2

Explain 2 ways in which biological diversity might help us-

Answer 2

hep maintain life on earth, higher chance of survival, more secure food and nutrition

Question 3

How do scientists believe separate species have developed?-

Answer 3

when populations are geographically separated, they will diverge

Question 4

Structural adaptation example-

Answer 4

giraffe long neck help them reach food that others can’t

Question 5

Behavioral adaptation example-

Answer 5

skunk spray to keep predators away

Question 6

How might having a high level of biodiversity in a forest prevent a pine beetle attack?:

Answer 6

If there is more variation of trees in a forest (pine beetles only eat/burrow in pine trees) the bugs are less likely to destroy an entire forest. If a forest was completely made up of pine trees it would be more prone to pine beetles

Question 7

Niche example-

Answer 7

coyote: help control population of small mammals, lives in North American grasslands

Question 8

When members of a species have to compete for a food source, what gives one an advantage
over the other?-

Answer 8

certain traits passed from their parents, like speed or sharper teeth/ variation

Question 9

When two species compete for resources in one environment, how could this competition
be reduced?-

Answer 9

biodiversity

Question 10

Why do ecosystems in the far north have low bio-diversity but high numbers of the species that do live in the area?-

Answer 10

because humans don’t live in cold areas too much so the animals are less disturbed

Question 11

Explain the difference between variation and biological diversity-

Answer 11

variation= dif genetic among the same species.

biological diversity variation among life on earth

Question 12

Explain the difference between a broad niche and a narrow niche. State one advantage and
one disadvantage of each

Answer 12

Broad niche- when animals can live in a wide range of places (human)

Disadvantage- big population/ more comp
Advantage- can live anywhere

Narrow Niche- has certain needs (polar bear)

Disadvantage- can’t survive in many places
Advantage- low population

Question 13

When part of their environment is destroyed, would a specialist or a generalist be affected
the most?-

Answer 13

specialist bc they can’t go anywhere else

Question 14

Symbiotic relationships-
Mutualism (both benefit)- bee and flower (bee gets food, flower reproduces)
Commensalism (one benefits one stays the same)- tree frog using plants as protection
Parasitism (one benefits one gets harmed) - tapeworm

Answer 14

Mutualism (both benefit)- bee and flower (bee gets food, flower reproduces)

Commensalism (one benefits one stays the same)- tree frog using plants as protection

Parasitism (one benefits one gets harmed) - tapeworm