The ticks of a genetic clock are measured by the
A. number of random mutations.
B. number of dead cells.
C. amount of RNA.
D. amount of DNA.
A
You might also like to view...
Stool received for routine culture in most clinical laboratories in the United States should be examined for the presence of at least:
a. Campylobacter, Salmonella, and Shigella spp. b. Salmonella and Shigella spp. c. Campylobacter and Vibrio spp. d. Salmonella, Shigella, and Vibrio spp.
Humans are ____ animals
a. oviparous b. viviparous c. ovoviviparous d. marsupial e. parthenogenic
Which of the following is not an accurate statement describing the contributions of researchers to the structure of DNA?
A. Erwin Chargaff determined that the percent of adenine was equal to the percent of thymine and the percent of guanine was equal to the percent of cytosine. B. Watson and Crick used the work of previous researchers, including Chargaff and Franklin to determine the overall structure of DNA with sugar and phosphate components making up the strands with the nitrogenous bases in the interior. C. Rosalind Franklin used X-ray crystallography to determine that DNA was a double helix in shape. D. Alfred Hershey and Martha Chase injected viruses into mice to determine that the inheritable material was DNA and not protein.
Brian is playing a neuroscience trivia game. He is trying to figure out which neuron has its soma in the spinal cord and receives excitation through its dendrites and conducts impulses along its axon to a muscle. What should he guess?
a. motor neuron b. interneuron c. glianeuron d. sensory neuron