What term describes the many components of tobacco smoke that are known to cause cancer?
What will be an ideal response?
carcinogens
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Support for evolution has come from fossil evidence. All of the following statements about the fossil records are true except one. Choose the exception
a. Fossils found in adjacent rock layers are more similar to each other than those found in distant layers. b. Many organisms that lived previously were different from today's living organisms. c. All types of organisms have left a fossil record. d. Different organisms were present at different times in Earth's history. e. In general, simpler forms of organisms are found in older rocks; more complex forms in younger rocks.
Which of the following is NOT under the
control of the autonomic nervous system?
a. smooth muscle b. cardiac muscle c. glands d. skeletal muscle e. all of these are under the control of the autonomic nervous system
Gram staining divides bacteria into ____
groups based on differences in the composition of their ____. a. two; DNA b. four; capsules c. two; cell walls d. four; cell walls e. two; plasma membranes
Membranes that do not contain glands are called
A. espiratory B. serous C. dense D. mucous