June 2023 Living Environment Regents Questions 41-52 Question Preview (ID: 62095)

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In order to observe whether or not this root tip was growing, the student should

a) switch to a higher magnification and look for evidence of cell division

b) switch to a lower magnification and look for evidence of cell division

c) switch to a lower magnification and add a stain to the onion root tip cells

d) switch to a higher magnification and add salt solution to the onion root tip cells

Which statement is an example of a hypothesis that can be tested through experimentation?

a) The number of times a dog wags its tail is a direct measure of how happy the dog is.

b) Is the ability of a fish to taste food affected by how clear the water is where it lives?

c) A plant’s fear of herbivores increases as the plant grows older.

d) Bacterial growth will rapidly increase as the temperature increases.

In addition to slowing the rate of soil loss, another potential benefit of this action would be

a) a decrease in atmospheric carbon dioxide levels

b) more land available for agriculture

c) a decrease in the amount of firewood for heating

d) more locations for the construction of new homes

The nutritional roles of the whitebark pine trees and the beetles are best described as

a) producer and carnivore

b) producer and herbivore

c) predator and decomposer

d) herbivore and parasite

The dependent variable in this study is the

a) proportion of mountain pine beetles

b) increasing temperature of the area

c) time that the study was conducted

d) proportion of live mature whitebark pine trees

Which statement most accurately summarizes the function of pepsin?

a) It prevents harmful substances from entering the stomach.

b) It regulates the transport of starch across the cell membrane.

c) It controls the rate at which certain chemical reactions occur.

d) It prevents the production of harmful by-products in stomach cells.

Which two species of finch would be affected if a bird with a grasping beak that ate ants and beetles was introduced into their habitat?

a) large ground finch and warbler

b) woodpecker finch and small ground finch

c) large tree finch and small tree finch

d) cactus finch and medium ground finch

Comparisons between species can be done using both structural and molecular evidence. An example of using structural evidence is comparing

a) seed characteristics

b) enzyme characteristics

c) amino acid sequences

d) DNA banding patterns

Which row in the data table below best supports the evolutionary diagram constructed by the scientists?

a) 1

b) 2

c) 3

d) 4

The purpose of checking the breathing rate before exercising is that it

a) serves as a control for the experiment

b) is needed to form a hypothesis

c) can be changed to form a conclusion

d) can be used to predict the results

Using the Universal Genetic Code Chart, how many messenger RNA codons code for the amino acid leucine (LEU)?

a) 6

b) 2

c) 8

d) 4

What is the DNA sequence that codes for the messenger RNA codons shown in Species X?

a) AAT GGG ATT TCT

b) ACC AAT GGG TCT

c) AAT GGG TTA TCT

d) TCT AAT GGG TCT

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