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Which statement is an example of the inter- dependence of organisms?*
Residents of a town are concerned that a recently built factory could pose health risks. Scientists were asked to investigate the effects of the factory on the health of local residents. The most relevant information they reported was that*
Farmers may someday clone their best milk- producing cow into a whole herd. What potential disadvantage might be important to consider in having such a large group of clones on one farm?*
DNA replication occurs in preparation for*
An individual eats a hamburger. Which two systems must interact to transfer the nutrients in the hamburger to human muscle tissue?*
The diagram below shows cell A completing a life process.
Cell A performs functions similar to the tissues and systems in complex, multicellular organisms. This process results in*
The shape of a protein molecule directly determines its*
The diagram below represents a cell and some molecules in its environment.
Which molecule would require the use of energy in order to be brought into the cell?*
Many domestic plants that are currently used for food by humans share a wild plant ancestor. The changes that have occurred in four common plants and the results are shown in the chart below.
What event most likely produced the changes that occurred in the wild plant ancestor?*
A strand of DNA in a skin cell contains the bases:
After the cell is exposed to ultraviolet light, the strand contains the bases:
Which statement describes the result of this exposure?*
An ameba, a one-celled organism, can move, ingest, and transport materials within the cell, because it has*
In humans, the placenta is essential to the embryo for*
A student infected by a common cold virus ran a low-grade fever. After a few days, the student’s temperature returned to normal and the student was free of cold symptoms. The fever served as*
Many animals have developed courtship behaviors. Males will often dance, swim, or sing in a particular way to attract a female. Males who are more successful at the courtship behavior will have a greater chance of having more offspring. This behavior is a result of*
After a zygote is formed, specialization of cells occurs. Through which process do the cells of a zygote become specialized?*