African-Americans have life expectancies that are about __________ years shorter than that of whites. Poor people have life expectancies that are __________ years shorter than that of wealthier people

Fertilization normally takes place in the uterus

a. True b. False Indicate whether the statement is true or false

Which of the following is true about animal communication

a. Animals exhibit varied cries, gestures, and mating calls, but even these communications are often not understood by other animals of the same species. b. Although animal communication is limited, they can learn to use human language with ease and eventually attain the communication skills of the average high school sophomore. c. Animal communication can truly be called a language because it consists of symbols, grammar, and, most importantly, it is productive. d. While psychologists don't doubt that animals communicate, there is disagreement as to whether or not animals can actually be taught a language.