August 2022 Living Environment Regents Questions 31-50 Question Preview (ID: 59965)

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Which statement most correctly describes how these two systems interact when an individual comes down with a foodborne illness?

a) 1

b) 2

c) 3

d) 4

Which statement describes an observation that would best support the continued study of using antibodies produced by this new technique against the fl u?

a) A group of 50 mice with flu antibodies formed using the new technique were exposed to mutated forms of the flu. None of the m

b) The use of these antibodies in mice stopped mutations that occur in flu viruses.

c) Chemical tests showed that the stem antibodies attached to the heads of some flu viruses and destroyed them.

d) Blood tests showed that “stem”antibody attacking the stem of flu antigens can cause the flu in mice. Those attacking head not

Which two rows best support the information provided?

a) A and B

b) B and C

c) C and D

d) D and A

Which statement is the most likely explanation for the color differences in the fur of the fox at different times of the year?

a) Mutations can be caused by changes in the number of biotic factors in the environment.

b) The expression of genes can be modifi ed by the external environment.

c) Hereditary information is contained in genes located in the chromosomes of each cell.

d) Random changes in DNA can occur to change the expression of a gene.

Only an electron microscope can be used to view

a) bacteria

b) mitochondria

c) animal cells

d) viruses

A scientist is developing a system to remove harmful bacteria from a contaminated water supply. In order to trap the bacteria and prevent them from going through the fi lter, she must make sure the pores in the fi lter are no larger than

a) 1 nm

b) 1 μm

c) 10 μm

d) 100 μm

In tropical areas, the best explanation for having increased melanin in human skin cells is that it

a) increases the occurrence of mutations

b) provides a survival advantage

c) acts as a feedback mechanism to increase UV exposure

d) produces antibodies that destroy pathogens

Smoking increases the risk of certain cancers of the mouth, esophagus, pancreas, kidneys, and uterus. This fi nding would be most reliable if it were based on

a) data collected from patients in one cancerresearch hospital

b) research done by scientists in many different countries

c) reading the information on cigarette cartons

d) cancer information published on social media sites

Which diagram below best represents the direction that energy flows through an energy pyramid?

a) 1

b) 2

c) 3

d) 4

Which conclusion is correct, based on the evolutionary tree?

a) All of these species have certain DNA sequences in common.

b) Species S is the best adapted of all the species shown.

c) A common ancestor of species L and M is species N.

d) Species O and P are more closely related than species P and Q.

At which hour were the lights turned on in the lab?

a) 8

b) 2

c) 0

d) 4

During the 8 hours studied, the plant performed

a) photosynthesis, only

b) respiration, only

c) both photosynthesis and respiration

d) neither photosynthesis nor respiration

Antihistamines are medications taken to block this reaction. Which of the antihistamine molecules represented below would be the most effective?

a) 1

b) 2

c) 3

d) 4

The data represented on the maps best indicate that

a) birds have spread WNV to every state in the United States

b) New York State has the highest rate of WNV infection for both of the years shown

c) once WNV reaches a state, the number of people infected increases every year

d) for any given year, it is diffi cult to know which states will have the greatest number of cases

Which statement best describes what would happen in this ecosystem if the phytoplankton were removed from the food web?

a) Copepods and krill would fi ll the vacant niche.

b) The number of heterotrophs would increase.

c) The food web would be disrupted, and organisms would die.

d) The food web would remain stable.

Based on the food web, the population that contains the greatest amount of available energy would be

a) seals

b) fishes

c) phytoplankton

d) humans

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