According to the Centers for Desease Control and Prevention (CDC). breast cancer is the most common cancer affecting women in the United States. It makes up realy 38 percent of the top ten types of cancer dagreed among women Wuch of the following statements regarding risk factors for breast cancer is true?
A person must have a family history of breast cancer in order to develop the disease
There is no chance that a person will develop breast cancer it smoking alcohol use, and poor diet are avoided
By changing environmental factors, a person can lower the probability that their child will inherit a gene linked with breast cancer
As environmental factors contributing to breast cancer are identified and changed the overall incidence of breast cancer may decrease

Examine the two squirrel populations in the accompanying figure. the populations are separated by a geographic barrier. if after a long period of time the two species are no longer separated, what evidence is needed to determine if speciation has occurred? the figure shows two populations of squirrels separated by a geographic barrier. examine the two squirrel populations in the accompanying figure. the populations are separated by a geographic barrier. if after a long period of time the two species are no longer separated, what evidence is needed to determine if speciation has occurred? the figure shows two populations of squirrels separated by a geographic barrier. polyploidy is creating new species. the two populations are not interbreeding freely. hybrid offspring of the two populations begin to appear. one species will increase into a population size twice as large as the other species.

Which diagram best represents the chromosomes that would be found in a two new skin cells produced as a result of this process?

Which enzyme is responsible for “unzipping" the dna by breaking the hydrogen bonds between the nucleotides?