Question

Which of the following processes removes oxygen from the abiotic environment?

Question 20 options:

	combustion
	photosynthesis
	respiration
	both respiration and photosynthesis
	both respiration and combustion
	both photosynthesis and combustion

When we burn fossil fuels, which matter cycle are humans continuing?

Question 21 options:

	carbon
	phosphorus
	nitrogen
	water

Cells similar in shape and function work together as

Question 22 options:

	organ systems
	organs
	tissues
	organisms

Which of the following is a cure for kidney failure?

Question 26 options:

	hemodialysis
	renal dialysis
	peritoneal dialysis
	there is no cure, only treatments

Monoculture is

Question 29 options:

	any habitat that contains primarily one species of plant
	the number of species in a given ecosystem
	the situation found most often in natural systems
	any habitat that contains only one plant species and one animal species