chapter 23 ecosystems

Question 2

In the atmosphere, carbon is found in the form of …

Answer 2

carbon dioxide

Question 3

During photosynthesis, carbon dioxide is converted into organic carbon-containing compounds.

What is this process called?

Answer 3

carbon fixation

Question 4

what eats producers in a food chain and transfers carbon-containing molecules

Answer 4

consumers

Question 5

Producers and consumers release carbon dioxide back into the atmosphere through the process of …

Answer 5

respiration

Question 6

Dead producers and consumers are broken down by organisms called…

Answer 6

decomposers

Question 7

These organisms break down dead producers and consumers in a process called…

Answer 7

decomposition

Question 8

Fossil fuels are burned in a process called…. which releases carbon dioxide back into the atmosphere.

Answer 8

combustion

Question 9

describe how saprobionts obtain their nutrients (3 marks)

Answer 9

they secrete extracellular enzymes onto dead organic matter and digest it extracellularly and then absorb the products/nutrients

Question 10

suggest how the presence of detritivores may cause the activity of saprobionts to increase

Answer 10

increases surface area of dead/decaying matter

increases rate or reaction of enzymes /digestion by saprobionts