GED Science 2

Question 1

In the winter, people like to wear coats. Why is this?

Accepted Answer

Coats decrease the loss of body heat to surroundings through insulation.

Answer

Coats increase the temperature of cold air through convection.

Answer

Coats increase the amount of heat generated by the body through conduction.

Answer

Coats generate heat energy through solar power.

Answer

Coats transform cold wind energy into thermal energy.

Question 2

Which of the following is NOT true?

Accepted Answer

All organisms have a cell wall.

Answer

All organisms have genetic material.

Answer

All organisms are made of atoms.

Answer

All organisms are made of one or more cells.

Answer

All organisms are made of molecules.

Question 3

The polar bear's dense fur and an exceptionally thick layer of fat under its skin protect it against the freezing temperatures of the habitat. How is natural selection in the evolution of a thick coat of fur in polar bears best explained?

Accepted Answer

Polar bears with thinner fur did not survive because they were not well suited to the environment.

Answer

Polar bears with thicker fur only mated with other polar bears with thick fur.

Answer

Polar bears with thinner coats of fur were killed off by polar bears with thick coats of fur.

Answer

Polar bears with thinner fur head south for the winter.

Answer

Polar bears fur grew thicker because of genetic mutations of the animals.

Question 4

Which of the following is a source of genetic variation within a species?

Accepted Answer

Mutation

Answer

Selective breeding

Answer

Cloning

Answer

Natural selection

Answer

Biodiversity

Question 5

Rainfall in a tropical region is below average for 20 consecutive years. Animals adapted for dry conditions are much more plentiful at the end of the 20 years. Which of the following statements best explains the increase in the population of these animals?

Accepted Answer

Natural selection has favored insect species with a high tolerance for dry conditions.

Answer

Insects with a high tolerance for dry conditions have migrated out of the region.

Answer

Biodiversity in the region has increased due to the dry conditions.

Answer

Natural selection has selected against insect species that are adapted for dry conditions.

Answer

Cloning has favored insect species with a high tolerance for dry conditions.

Question 6

Which of the following sets of organisms would be found in a wetland ecosystem?

Accepted Answer

Salamander, mosquito, frog

Answer

Tortoise, lizard, fly

Answer

Wolf, coyote, bobcat

Answer

Lion, giraffe, beetle

Answer

Moose, seal, lemming

Question 7

Most bacteria cannot grow in high concentrations of salt. As a result?

Accepted Answer

salt acts as a preservative in many foods including dill, pickles, beef jerky, ham.

Answer

people who don’t eat enough salt become anemic.

Answer

the Dead Sea is filled with bacteria.

Answer

most antibiotics are bitter.

Answer

there are no bacteria in fresh water.

Question 8

There are four blood types in humans: A, B, AB, and O. An individual with blood type A has antibodies for B, so he or she can’t receive type B blood. Similarly, a person with blood type B has antibodies for type A and can’t receive type A blood. A person with AB blood type has no antibodies and can receive blood from anyone. A person with type O blood has both A and B antibodies and can receive blood only from someone else with type O blood. Based on this information, someone with type A blood can donate to?

Accepted Answer

Blood groups A and AB.

Answer

Blood groups A and O.

Answer

Only blood group O.

Answer

Only blood group AB.

Answer

Only blood group A.

Question 9

Which of the following levels of organization best represents the sequence from smallest unit to largest?

Accepted Answer

Cell, tissue, organ, organ system

Answer

Cell, organism, organ, tissue

Answer

Cell, organism, tissue, organ system

Answer

Cell, tissue, organism, organ

Question 10

Grey fur color predominates over white fur color in mice. Two mice mate and have children; the female mouse has the genotype (gg), which causes white fur, while the male mouse has the genotype (Gg), which causes grey fur. Calculate the likelihood that these two mice will have offspring with white fur using the Punnett square.

Accepted Answer

50%

Answer

20%

Answer

70%

Answer

80%

In the winter, people like to wear coats.Why is this?

In the winter, people like to wear coats.
Why is this?