January 2020 Living Environment Regents Questions 21-30 Question Preview (ID: 56865)

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Many bacteria and fungi are important in the environment because they

a) return energy to the environment, making it available for plants

b) recycle nutrients, making them available for other organisms

c) produce glucose through the process of respiration

d) reverse the fl ow of energy in the ecosystem

Which statement best describes a characteristic of the carrying capacity of an ecosystem?

a) It can be illustrated with a food web.

b) It allows organisms to produce populations of unlimited size.

c) It is determined directly by an organism’s reproductive success.

d) It is limited by the habitat’s available energy and nutrients.

The substance responsible for breaking down the Venus flytrap’s prey most likely contains

a) chlorophyll molecules

b) glucose molecules

c) hormone molecules

d) enzyme molecules

It may be harmful when people compete to see who can hold their breath the longest under water. Without oxygen, brain cells

a) cannot make enough ATP

b) have too few mitochondria

c) make too many enzymes

d) have too much water

A valid conclusion based on the information in the graph is that

a) the pH of some enzymes changes as the temperature changes

b) enzymes change color in proportion to the rate of activity

c) a difference in the pH of an environment changes enzyme activity

d) enzyme activity causes acids to change into bases over time

Euglena will most likely act as consumers when placed in an environment that has

a) an acidic pH

b) a low oxygen level

c) little or no light present

d) many predators

Which two processes are most directly represented in this diagram?

a) ATP synthesis and the diffusion of water

b) molecule transport and energy use

c) homeostasis and ATP synthesis

d) homeostasis and the diffusion of water

The populations of the two species increase and decrease based on the numbers of each species present. This relationship is an example of

a) ecological succession

b) an energy pyramid

c) interdependency

d) competition

Which statement best explains this development?

a) Specialization occurs, resulting in the formation of a great variety of cell types.

b) Genes are inserted into the zygote to allow for the formation of different cell types.

c) The expression of genes responsible for the different cell types is controlled by the placenta.

d) The genetic information in the zygote is divided to produce a complete set for each cell type.

The diagram represents

a) cellular differentiation

b) dynamic equilibrium

c) gene interaction

d) biological evolution

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