Question

Which of the following is the most accurate description of an organism’s direct fitness?

	A.	Its reproductive success measured by number of their offspring that also reproduce.
	B.	The sum of the organism’s strength and stamina.
	C.	The ability of the organism to survive in the face of predators, disease, parasites, and competition.
	D.	How well an organism blends into its environment to escape detection.
	E.	None of the above is related to direct fitness.

Which of the following is probably the biggest environmental problem facing the Earth’s ecosystems at this time?

	A.	pollution
	B.	food shortage
	C.	climate change
	D.	habitat destruction
	E.	Human population size and growth, as this is (or at least may be) the root cause of all of the above as well as other environmental problems.

Which of these contains structures called flame bulbs that function in filtration?

	A.	Nephrons
	B.	Malpighian tubules
	C.	Metanephridia
	D.	Protonephridia
	E.	All of the above

Answer 1

Q.Which of the following is the most accurate description of an organism’s direct fitness?

Solution:

A.Its reproductive success measured by number of their offspring that also reproduce.

Direct fitness is the measure of ability to reproduce.

Direct fitness is the number of viable offspring produced by an organism.the proportion of genes a given individual contributes to the next generation.

Q.Which of the following is probably the biggest environmental problem facing the Earth’s ecosystems at this time?

Solution:

A.pollution

Pollution is one of the primary causes of many of the other environmental problems,Including climate change,food shortage and habitat destruction

Types of pollutions – air, water, soil, noise, radioactive, light and thermal.

Pollution and environmental concerns are influence one another

Q.Which of these contains structures called flame bulbs that function in filtration?

Solution:D.protonephridia

protonephridia is a specialized excretory cell.These cells have the ability to remove waste materials within an organ of a particular living organisms.