A single muscle cell is called:

a. myofibril

b. sarcomere

c. muscle fiber

d. myofilament

Avery, MacLeod, and McCarty (1944) demonstrated that DNA was the genetic material by treating heat-killed Streptococcus pneumoniae S (smooth) strain with DNase, thereby preventing transfer of the "transforming substance" from the killed S strain to

Which statement would least likely be used to describe variation? Variations are inherited differences between individuals of the same species. Variations that decrease reproductive success are more likely to be passed on.

Neutron activation analysis involves bombarding specimens with neutrons and then measuring the resultant: a. X rays. b. Gamma rays. c. Beta particles. d. Alpha particles.

How would shoot and root growth be affected by a mutation that caused plants to lose the ability to polymerize glucose into starch granules? Select all that apply.

A blastocyst is a A. cluster of cells surrounding a developing egg in the uterus. B. membrane that surrounds and protects a growing embryo in the uterus. C. growth that can form in the wall of the fallopian tubes. D.

Which of the following is a constructive process? deposition detachment transport plucking

Coal deposits were formed from? A. Plant life in ancient B. Ancient plankton and marine life C. Freshwater organisms from the last 100,000 years D. Modern plants and animals

According to the Hardy-Weinberg principals, which of the following can prohibit genetic equilibrium?

Rickettsia are obligate intracellular parasites that are transmitted by arthropods. In which of the following places would you most likely find the parasites living in the host organism during the course of infection? A.

How are viruses able to move between species?