June 2021 (v202) Living Environment Regents Questions 31-40 Question Preview (ID: 56884)
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The most likely reason for the differences in plant growth in the different pots was
a) cyclic changes in the plants’ ecosystems
b) ecological succession over time
c) the amount of light available for each setup
d) competition for resources in each setup
According to the graph, which statement is true concerning the growth of the plants?
a) The plants in the pot with only 5 plants grew to be an average of 40 cm tall in 30 days.
b) The plants in the pot with only 10 plants grew to be an average of 30 cm tall in 20 days.
c) The plants in the pot with 15 plants grew an average of 20 cm taller after a period of 10 days.
d) The plants in the pot with 20 plants grew an average of 20 cm taller after a period of 40 days.
The dependent variable for this experiment was
a) the number of plants per pot
b) time in days
c) average plant growth
d) the amount of water per pot
Which statement correctly identifies a possible role of one organism in this ecosystem?
a) Species A may carry out autotrophic nutrition.
b) Species B may be a producer that synthesizes nutrients.
c) Species C carries out heterotrophic nutrition.
d) Species D can recycle energy from the Sun.
Which statement correctly describes an interaction that contributes to the stability of this ecosystem?
a) Species E is not affected by the activity of species A.
b) Species B returns compounds to the environment that may later be used by species C.
c) Species C recycles nutrients from species B and D to obtain energy.
d) Species D is directly dependent on the autotrophic activity of species B.
Although the Venus flytrap uses its prey to obtain certain molecules that it needs, it is still classified as a producer because it
a) uses its prey to produce food
b) consumes the prey to produce energy
c) synthesizes energy by using oxygen and releasing carbon dioxide
d) synthesizes glucose by using carbon dioxide and water
Enzymes secreted by cells in the leaves of the Venus flytrap can digest
a) proteins into amino acids
b) sugars into starches
c) amino acids into fats
d) proteins into sugars
Which choice represents a possible hypothesis for Marshall’s experiment?
a) Does Helicobacter pylori cause stomach ulcers in people?
b) If a person takes an antibody, then they will not develop an ulcer.
c) Does exposure to infectious bacterial cells make people sick?
d) If a patient is infected by Helicobacter pylori, then they will get an ulcer.
The work of Marshall and Warren shows that
a) hypotheses made by physicians are always correct
b) scientific explanations are revised based on new evidence
c) peer review always leads to the immediate acceptance of results
d) conclusions must always be consistent with those made by other scientists
Due to the differences in structure, each of these molecules most likely
a) is composed of different molecular bases
b) forms a different protein
c) contains different elements
d) performs a different function
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