an element's atomic number is the A. mass of the atom B. number of the protons in an atom's nucleus C. weight of the atom D. sum of the protons and neutrons in an atom

Nterruption of blood supply to the brain caused by cerebral thrombosis, cerebral embolus, or cerebral hemorrhage is

Conduction is the transfer of heat from a. warmer objects to cooler objects by direct contact. b. cooler objects to warmer objects by direct contact. c. cooler objects to warmer objects by waves.

An animal has 20 body segments and has no mandibles. Which type of animal is it?

A population of 100 butterflies living on an acre of land loses three-quarters of its members when a sudden freeze in the spring occurs just after they emerge as caterpillars. This population has undergone a reduction in population size due to A.

It is the study of the structure and function of plant and animal cells

Why would a lab technician choose a bacterial artificial chromosome for cloning a gene rather than a plasmid?

What type of molecule that can be found in living things lacks carbon atoms

The major weakness of the job descriptive index (jdi) is that

What word refers to traces of an organism that existed in the past?

Which of the following would likely extend the Earth's supply of a nonrenewable resource?