January 2023 Living Environment Regents Questions 11-20 Question Preview (ID: 61238)

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X most likely represents

a) the nucleus

b) the mitochondrion

c) sunlight

d) carbohydrates

Each of the cells present in a woman contains a complete set of chromosomes. The only exceptions are her

a) skin cells

b) egg cells

c) nerve cells

d) lung cells

When a plant is in a hot and dry environment, the guard cells may close the stomate openings in the leaves. This action will directly

a) maintain homeostasis by reducing the evaporation of water

b) harm the plant by cutting off its oxygen supply

c) maintain homeostasis by preventing carbon dioxide from enter

d) harm the plant by cutting off its energy supply

Destruction of ocean habitats by pollution today means that the organisms living there may not survive in the future. By polluting the oceans, humans are

a) helping advance economic gains by using resources wisely

b) altering the equilibrium of ocean ecosystems

c) decreasing the rate of species extinction

d) increasing the stability of the oceans

A Christmas tree farmer cuts down a native forest to plant Frasier fi r trees. Compared to the original forest, the newly planted Christmas tree farm will most likely be

a) more stable and more diverse

b) more stable and less diverse

c) less stable and more diverse

d) less stable and less diverse

One reason why scientists are concerned about this type of pollution is that

a) the presence of these fluids in waterways could make them uninhabitable for aquatic organisms and reduce water supplies for

b) the addition of these fluids will cause an increase in the levels of lakes and rivers, possibly causing flooding in nearby

c) these fluids increase the rate of photosynthesis in aquatic plants, reducing the amount of O2 available for other life forms

d) addition of these chemical to waterway less air quality,which would lead to increased respiratory diseases and global warming

Which action by humans has most likely contributed to climate change?

a) recycling materials

b) protecting wildlife

c) maintaining the ozone shield

d) burning fossil fuels

Which statement about the functioning of the human reproductive system is correct?

a) The zygote helps the mother provide milk to the fetus before it is born.

b) Testes produce unfertilized eggs and release them so that they can be fertilized by sperm.

c) Ovaries are where male gametes undergo meiosis to reduce their chromosome number.

d) The uterus is where the fetus develops internally until birth.

Some organisms have variations. Two sources of these variations are

a) mitotic and meiotic cell division

b) mutations and recombination

c) cloning and sexual reproduction

d) natural selection and evolution

In order to prepare for a future outbreak of Ebola, a harmful virus, two vaccines were tested. In order for either of these vaccines to be effective, they must

a) cause the immune system to produce special proteins that will recognize and destroy the virus

b) be able to destroy the DNA code that produces white blood cells that can carry the virus

c) stimulate the human body to produce antigens that can attach to and destroy the Ebola virus

d) produce bacterial cells that can attack the Ebola virus

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