Question

what does a pyramid of biomass represent?
a) range of food webs found in one trophic level
b) amount of living tissue within a trophic area
c) number of total organisms within each trophic level
d) percentage of energy that’s passed through each trophic level
question 18 (5 points)
listen
which of the following is an appropriate problem statement for a science experiment?
a) the effect of microplastic on the gut of small fish is unknown to humans.
b) what is the effect of microplastic on the digestion processes of small fish?
c) what is microplastic?

Explanation:

First Question (Pyramid of Biomass):

• Option A: A pyramid of biomass doesn't represent food webs' range in a trophic level. Food webs are about interactions, not biomass.
• Option B: A pyramid of biomass shows the total mass of living organisms (living tissue) at each trophic level in a given area, so this matches the definition.
• Option C: The number of organisms is a pyramid of numbers, not biomass.
• Option D: Energy transfer between trophic levels is shown by an energy pyramid, not a biomass pyramid.

Question 18 (Appropriate Problem Statement):

• Option A: States something is unknown, which is not a problem statement for an experiment (it's a statement of ignorance, not a testable question).
• Option B: Is a clear, testable question that can guide a science experiment (investigating the effect of microplastic on digestion in small fish).
• Option C: Is a question about defining microplastic, not a problem for an experimental investigation (it's a descriptive question, not experimental).

Answer:

B) Amount of living tissue within a trophic area