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The Following Questions Refer to the Evolutionary Tree in Figure

question 15

Multiple Choice

The following questions refer to the evolutionary tree in Figure 22.2.
The tree's horizontal axis is a timeline that extends from 100,000 years ago to the present; the vertical axis represents nothing in particular. The labeled branch points on the tree (V-Z) represent various common ancestors. Let's say that only since 50,000 years ago has there been enough variation between the lineages depicted here to separate them into distinct species, and only the tips of the lineages on this tree represent distinct species.

-Some members of a photosynthetic plant species are genetically resistant to an herbicide, while other members of the same species are not resistant to the herbicide. Which combination of events should cause the most effective replacement of the non-herbicide-resistant strain of plants by the resistant strain?
1) The presence of the herbicide in the environment
2) The absence of the herbicide from the environment
3) The maintenance of the proper conditions for one generation
4) The maintenance of the proper conditions for many generations

Comprehend how bile aids in the digestion and absorption of fats.

Identify the sites of specific enzyme action within the digestive system.

Understand the mechanisms aquatic animals use to prevent toxic accumulation of ammonia.

Identify the main points of entry and exit for water and nitrogenous wastes in aquatic animals.

Definitions:

Physical Abuse

The intentional use of physical force to cause harm or injury to another person.

Sexual Abuse

Unwanted sexual activity, with perpetrators using force, making threats, or taking advantage of victims unable to give consent.

Stepfamily

A family where at least one parent has children that are not genetically related to the other spouse or partner.

Childhood

the period of a person's life from birth until adolescence, characterized by growth, development, and learning in a social context.