Which of the following statements is true? only a few species have become extinct in the past 500 years. there have only been two mass extinctions in earth's history. the worst mass extinction was the most recent involving the dinosaurs. scientists believe human destruction of the environment is causing another mass extinction.

Why was mendel's work not accepted at the time? o a. his results were false. o b. he did not repeat his experiments. o c. he did not have any data. o d. his results were surprising,

What is the main reason that attitudes are more often revealed in spoken rather than written language? a. in writing, we try to put the "best face" on what we write. b. we speak far more often than we write. c. in writing, we can more easily conceal our attitudes. d. in spoken language, we are often careless in our use of words.

The basic types of tissue in the human body are