Ecology

Question 1

Which of the following interspecific interactions would be considered a symbiosis?

Answer 1

parasitism

Question 2

To recycle nutrients, the minimum an ecosystem must have:

Answer 2

producers and decomposers.

Question 3

Aquatic primary productivity is most limited by which of the following?

Answer 3

light and nutrient availability

Question 4

A cow’s herbivorous diet indicates that it is a(n)

Answer 4

primary consumer.

Question 5

You are involved in the development of an self sustained theme park of wild cats(lions, tigers,). Approximately how many Joules of primary production will be needed support this group of secondary consumers requiring 200J ? (show your calculations)

Answer 5

200J (10)= 2,000J

2,000J (10%)= 20,000J

20,000 J

Question 6

i. What is the amount of carbon dioxide in the air?

ii. What might happen if this carbon dioxide was completely removed from the air?

Answer 6

i. 0.04%

ii. Plants wouldn’t be able to do the process of photosynthesis. Plants would die because they wouldn’t grow properly.

Without plants, animals that rely on them would start to die because they wouldn’t have food. It would be chaos for all the Earth.

Question 7

Although most of the air is nitrogen why is it unavailable to most organisms?

Answer 7

Most living things can’t use nitrogen directly because it’s a form they can’t grab onto. Special bacteria and plants can change it into usable form for everyone else.