August 2018 Living Environment Regents Questions 1-10 Question Preview (ID: 56839)

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Which human activity most directly causes a significant increase in the amount of carbon dioxide in the atmosphere?

a) growing corn for food

b) not using products containing plastics

c) driving cars long distances

d) planting large numbers of trees

An immune response is primarily due to the body’s white blood cells recognizing

a) a hormone imbalance

b) abiotic organisms

c) foreign antigens

d) known antibiotics

The technique used to produce this new variety of mosquito is most likely

a) chromatography

b) genetic engineering

c) electrophoresis of genes

d) selective breeding

The organic compounds that scientists use to cut, copy, and move segments of DNA are

a) carbohydrates

b) enzymes

c) hormones

d) starches

Which statement most accurately predicts the result of interfering with populations in the web?

a) Removing the cricket population will have little effect on the balance of the food web.

b) Removing all the mountain lions from the food web will benefit the ecosystem.

c) Removing the cricket and rabbit populations would cause the number of trees to decrease.

d) Removing deer from the food web will affect the rabbit and grass populations.

A factor not shown in the diagram that provides energy for living organisms is

a) carbon dioxide

b) water

c) the Sun

d) oxygen

Which conclusion can best be made from this information?

a) PKG protein is synthesized only by the soldier ants.

b) Genes control which type of amino acids a cell can make.

c) Eating too much protein makes some organisms very aggressive.

d) The behavior of soldier ants is controlled in part by the PKG protein.

Genetic researchers have discovered a number of different gene mutations that have led to the development of cancer. These mutations affect how frequently a cell reproduces. Which process would be directly influenced by these mutations?

a) differentiation of cells in an embryo

b) meiotic cell division

c) division of sperm and egg cells

d) mitotic cell division

Lobsters are crustaceans related to crayfish, crabs, and shrimp. Most lobsters are a reddishbrown color, but on rare occasions, they can be orange, blue, or even multicolored. These color differences can be caused by

a) genetic variations

b) different numbers of offspring

c) overpopulation and excessive resources

d) the instability of the ecosystem

Which two factors could lead to the evolution of a species over time?

a) overproduction of offspring and no variation

b) changes in the genes of body cells and extinction

c) struggle for survival and fossilization

d) changes in the genes of sex cells and survival of the fittest

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