Stephen, an 83-year-old man, had an incident that left him unable to speak or swallow for a week stephen had suffered stroke that had affected part of his central nervous system. two months later, stephen's speech and swallowing had recovered, but he had a continued loss of taste sensation on the left side of his tongue. which nerves are involved in carrying taste sensation from the tongue?

In which state was more than 100 billion tons of coal mined in 2005?

Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.

Which of the following can occur to two segments of a population if they are geographically isolated 1.) they can only share some types of genes 2.)both groups most likely become extinct 3.)they find a way to come back together 4.)eventually they become separate species