One characteristic of all living things is that they*

The diagram below represents interactions between organisms in a stable ecosystem.

Which statement correctly describes organisms in this ecosystem?*

Due to overfishing, the number of fish in the ocean could drastically decrease. This will cause*

Which substance can enter a cell by diffusion without having to be digested?*

A single-celled organism is represented below.

Structure X carries out a function most similar to which structure in a human?*

Parrots are tropical birds. However, in some areas of New York City, some parrots have been able to survive outdoors year-round. These parrots survive, while most others cannot, due to*

Changing one base in a gene could have the most direct effect on the*

An alteration of genetic information is shown below.

A-G-T-A-C-C-G-A-T → A-G-T-G-A-T

This type of alteration of the genetic information is an example of*

The table below shows adaptations in two organisms.

The presence of these adaptations is most likely the result of*

The diagram below represents an activity that occurs in the human body.

This diagram best illustrates*

In which row in the chart below is a human action correctly paired with its environmental impact?

*

A laboratory technique is represented in the diagram below. Letter A represents a process.

Which specific chemicals are needed to success- fully carry out the process shown at A?*

The diagram below represents genetic material.

The expression of the section labeled X may be modified by*

Characteristics that are harmful to a species tend to decrease in frequency from generation to generation because these characteristics usually*

Which situation results in a characteristic that is inheritable?*