34.1-34.5 2

Question 1

True or false: No life can exist in dark environments like caves because all autotrophs are
dependent on the sun. If false, make it a correct statement.

Answer 1

False, chemoautotrophs can extract energy from inorganic chemicals in their environment.

Question 2

List three abiotic factors that influence organisms within their habitat and describe adaptations
that organisms have to these factors.

Answer 2

List three abiotic factors that influence organisms within their habitat and describe adaptations
that organisms have to these factors.

(1) Sunlight: Plants on a forest floor grow quickly to try to gain the advantage of sunlight that
comes through the trees.
(2) Temperature: Certain organisms have enzymes that can function at extremely high temperatures.
This enables them to survive in locations that would kill most other organisms.
(3) Water: Many plants have adaptations, such as waxy coverings, to help minimize water loss
in terrestrial environments.

Question 3

What two factors can explain the presence of a species in a particular area?

Answer 3

(1) The species evolved from ancestors living in that area or (2) they moved to that location.

Question 4

List and describe an adaptation that a pronghorn antelope has to an abiotic factor and an
adaptation it has to a biotic factor.

Answer 4

The pronghorn antelope is able to raise patches of its fur in the summer to help radiate heat away
from itself. The teeth of pronghorn antelope are adapted for biting and grinding plant material
- Holow hairs, Run fast

Question 5

The seasons of the year result from the ____________ of the Earth on its ____________.

Answer 5

tilt, axis