During the summer, the arctic fox produces enzymes that cause its fur to become reddish brown. During winter, these enzymes do not function. As a result, the fox has a white coat that blends into the snowy background. This change shows that

In a particular variety of corn, the kernels turn turn red when exposed to sunlight. In the absence of sunlight, the kernels remain yellow. Based on this information, it can be concluded that the color of these corn kernels is due to

Plants inherit genes that enable them to produce chlorophyll, but this pigment is not produced unless the plants are exposed to light. This is an example of how the environment can

A human liver cell is very different in structure and function from a nerve cell in the same person. This is best explained by the fact that

Genes are inherited, but their expressions can be modified by the environment. This statement explains why

The brown summer feathers of ptarmigans, small Arctic birds, are replaced by white feathers after winter arrives. Which statement best explains this observation?

A human liver cell and a human skin cell in the same person have the same genetic sequences. However, these cells are different because the liver cell

Although identical twins inherit exact copies of the same genes, the twins may look and act differently from each other because

A towel placed on a lawn for a length of time can cause the grass beneath it to lose its green color. The most probable explanation for this is that darkness

Scientific studies show that identical twins who are separated at birth and raised in different homes may vary in height, weight, and intelligence. The most probable explanation for these differences is that

Hereditary information is stored inside the

Most of the hereditary information that determines the traits of an organism is located in

A basketball player develops speed and power as a result of practice. This athletic ability will not be passed on to her offspring because

The transfer of genes from parents to their offspring is known as

Young birds that have been raised in isolation from members of their species build nests characteristic of their species. This suggests that the nest-building behavior is

Asexually reproducing organisms pass on hereditary information as

Which factor has the greatest influence on the development of new, inheritable characteristics?

Most cells in the body of a fruit fly contain 8 chromosomes. How many of these chromosomes were contributed by each parent of the fruit fly?

The genetic code of a DNA molecule is determined by a specific sequence of

The DNA of a human cell can be cut and rearranged by using

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