Question

1)Choose the statement that correctly describes ecological efficiency in an ecosystem.

a)Consumers at each trophic level convert only about 10% of the chemical energy in their food to their own organic tissue.

b)Consumers at each trophic level convert ALL of the chemical energy in their food to their own organic tissue.

c)Consumers at each trophic level convert about half of the chemical energy in their food to their own organic tissue.

2) Choose the factors that could decrease Earth's carrying capacity.

a)Natural disasters, such as hurricanes, earthquakes, and tsunamis that render ecosystems uninhabitable.

b)A large carbon footprint

c)Practicing sustainable living

d)Human practices such as the burning of fossil fuels.

3)Which of the following correctly describes "total fertility rate"?

a)It is a measure of the number of children per female.

b)It is about 2 children per female

c)It is different in different parts of the world.

d)Higher total fertility rates more dramatically affect population growth rates than lower total fertility rates.

e)It is the same is most parts of the world

f)It can be used to predict whether population growth rate will increase, decrease, or stabilize in the coming generations.

Answer 1

1. a. Consumers at eacha trophic level convert only 10% ofo chemical energy in their food to their own organic ti'ssue

Energy is transfered from ine trophic level to another and 90% of energy is lost

2 a. Natural disaster such as hurrucane

3 a. It is a measure of number of children per women