Biology EOC Review 4

Which of these is required for natural selection?

• All individuals of a population must be identical.
• There must be a small number of individuals in a population.
• There must be variation among the members of
• An individual must be forced out of its natural habitat.

The chart shows the embryos and adult forms of animals from different classification groups.  What do the embryos suggest about these three animals?

• The animals are not related.
• The animals share a common ancestor and are therefore related
• Fish are more closely related to humans than are chickens.
• Fish and chickens ar closely related, but humans are not related to either fish or chickens.

Fossils show that cyanobacteria evolved at least 3.5 billion years ago.  How did cyanobacteria change Earth's environment?

• They made it hotter.
• They added oxygen to the atmosphere.
• They added nitrogen to the soil.
• They added carbon dioxide to the atmosphere.

The standardized system for naming organism is known as binomial nomenclature.  What two pieces of information are used to name and identify organisms using this system?

• genus and species
• class and genus
• class and species
• domain and kingdom

The genetic variation that leads to evolution can occur when genes from one population are introduced into the gene pool of a different population.  This process is known as

• mutation
• crossing over
• natural selection
• gene flow

Which of these processes is most likely to increase the genetic diversity that plays a role in evolution?

• binary fission
• cell division
• asexual reproduction
• sexual reproduction

Which of these processes is most likely to increase the genetic diversity that plays a role in evolution?

• binary fission
• cell division
• asexual reproduction
• sexual reproduction

Which level of organization is represented by a group of different tissues working together to perform a complex function?

• cell
• tissue
• organ
• organism

All the organ systems of the human body work together to maintain homeostasis.  What is homeostasis?

• a stable internal environment
• response to external stimuli
• protection from bacteria and other pathogens
• the ability to pass characteristics to one's offspring

The hormones of the body help maintain homeostasis via negative feedback.  What happens in a negative feedback mechanisms?

• The body does not respond to a change in its environment.
• The body removes a stimulus prompting a response.
• A response to a change reverses the direction of the change.
• A response to a change increases the effect of the change.