GED Science 2
In the winter, people like to wear coats. Why is this?
Coats provide insulation by reducing the amount of heat lost from the body.
Which of the following is NOT true?
Animal cells usually don’t have a cell wall. Other statements are true.
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.
Natural Selection is the process whereby organisms better adapted to their environment tend to survive and produce more offspring. The theory of its action was first fully expounded by Charles Darwin and is now believed to be the main process that brings about evolution. In this case, polar bears with thicker fur were able to better survive in their environment while thinner furred polar bears died off over time.
Which of the following is a source of genetic variation within a species?
Mutation is the changing of the structure of a gene, resulting in a variant form that may be transmitted to subsequent generations.
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?
Natural Selection is the process whereby organisms better adapted to their environment tend to survive and produce more offspring.
Which of the following sets of organisms would be found in a wetland ecosystem?
A wetland is a land area that is saturated with water, either permanently or seasonally. A wetland ecosystem supports many species including, amphibians and reptiles.
Most bacteria cannot grow in high concentrations of salt. As a result,
Salty foods are less prone to bacterial attack because most bacteria can’t grow in environments that are too salty.
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
Someone who has blood type A can donate blood to those who don’t have antibodies for A. These include other people with type A blood (they have antibodies for B only) and those with type AB blood (they don’t have any antibodies).
Which of the following levels of organization best represents the sequence from smallest unit to largest?
Correct answer cell, tissue, organ, organ system