IB DP Biology: Ecology

Question 1

Why are oxides of nitrogen classed as greenhouse gases?

Accepted Answer

They trap some of the longwave radiation emitted by the Earth's surface.

Question 2

Which of the following processes does not increase the amount of atmospheric carbon dioxide?

Accepted Answer

photosynthesis

Question 3

Which of the following is not a type of organism that may become fossilised in limestone?

Accepted Answer

jellyfish

Question 4

What is the energy transfer level from the woodlice to the moles in the following food web?

Accepted Answer

same as the energy transfer from the slugs to the skunks

Question 5

Why does increasing the concentration of dissolved carbon dioxide represents a threat for coral reefs?

Accepted Answer

It will reduce calcification in corals and make them more brittle.

Question 6

True or False? Water vapour is the most abundant greenhouse gas in the atmosphere.

Accepted Answer

True

Question 7

Earth’s climate has changed over the last 150 years. Which description best describes climate change during this time?

Accepted Answer

an overall increase in global average temperatures with fluctuations

Question 8

What is the main cause of the dissolution of the calcium carbonate exoskeletons?

Accepted Answer

ocean's pH has dropped

Question 9

What is the main cause of the increase in CO2 levels from 1960 to 2000?

Accepted Answer

burning fossil fuels

Question 10

Identify level B of the numbers pyramid below.

Accepted Answer

secondary consumer

Question 11

Which organism(s) in the food web below is (are) both secondary consumer(s) and tertiary consumer(s)?

Accepted Answer

eagle and fox

Question 12

In a pyramid of biomass there may be two blocks on the primary consumer level − herbivores and _________ ?

Accepted Answer

decomposers

Questions 12