NYS Regents


PART A - Answer all 35 questions in this part. (35)

Directions (l-35): For each statement or question, write on the separate answer sheet the number of the word or expression that, of those given, best completes the statement or answers the question.

1 A biologist reported success in breeding a tiger with a lion, producing healthy offspring. Other biologists will accept this report as fact only if

(1) research shows that other animals can be crossbred
(2) the offspring are given a scientific name
(3) the biologist included a control in the experiment
(4) other researchers can replicate the experiment

2 The diagram below represents a pyramid of energy in an ecosystem.

Which level in the pyramid would most likely contain members of the plant kingdom?

(1) A       (3) C
(2) B       (4) D

3 Which condition would cause an ecosystem to become unstable?

(1) only heterotrophic organisms remain after a change in the environment
(2) a slight increase in the number of heterotrophic and autotrophic  organisms occurs
(3) a variety of nonliving factors are used by the living factors
(4) biotic and abiotic resources interact

4 Nerve cells are essential to an animal because they directly provide

(1) communication between cells
(2) transport of nutrients to various organs
(3) regulation of reproductive rates within other cells
(4) an exchange of gases within the body

5 Certain bacteria produce a chemical that makes them resistant to penicillin. Since these bacteria reproduce asexually, they usually produce off-spring that

(1) can be destroyed by penicillin
(2) mutate into another species
(3) are genetically different from their parents
(4) survive exposure to penicillin


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