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The organisms in a pond and the physical factors influencing them best describe*
Which row in the chart below best describes decomposers?
Some processes that occur in a cell are listed below.
• A. utilize energy
• B. detect changes in the environment
• C. rearrange and synthesize chemical compounds
Which processes will all living organisms use to maintain homeostasis?*
Which cell structures are correctly paired with their functions?*
The diagram below represents the region between two nerve cells. Cell A releases a chemical that travels to and binds with structure X on cell B.
Structure X most likely represents*
Over the past few thousand years, humans have helped to bring about changes in many plant and animal species in order to make them more useful. Examples include strong workhorses, hunting dogs, large-eared corn, and beautiful flower varieties. These changes were primarily brought about by humans, using the process of*
Certain antibacterial soaps kill 99% of the bacteria present on hands. Constant use of these soaps could be harmful over time because*
Which factor would cause two specialized tissues that contain identical chromosomes to function differently?*
Some variation must be present in a population in order for natural selection to take place. These variations arise from mutations in the DNA and*
The diagram below represents a segment of a gene on two chromosomes.
The change in the gene sequence is an example of*
In a certain species of insect, some individuals have flattened white disks on their bodies that protrude and interlock, resembling an orchid flower. This adaptation provides the insect with a better opportunity to capture its prey. If environmental conditions remain unchanged, it is most likely that, in future generations, the pro- portion of the population with this adaptation will*
Which structure is correctly paired with its function?*
The fruit fly represented in the diagram below has unusual, curled wings that formed after exposure to radiation.
In order for the fly to pass this trait on to its offspring, a change had to occur in*
In a population of birds, the percentage of individuals having a certain gene changes from 20% to 60% over the span of several hundred years. This situation will most likely affect the rate of*
The finite resources of Earth are often affected by increasing human consumption. These finite resources are*