A diploid cell has 44 chromosomes. After meiosis I, how many chromosomes does it have? How many chromatids?
A) 22; 22
B) 22; 44
C) 44; 22
D) 44; 44
B) 22; 44
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Within the human genome, 45% of the DNA is composed of what?
A. transposable elements B. highly repetitive DNA C. moderately repetitive DNA D. coding sequences E. noncoding sequences
Nematodes
A. are roundworms. B. are found in the gastrointestinal tract or the blood. C. are carried by bacteria. D. have flat segmented bodies. E. are roundworms AND are found in the gastrointestinal tract or the blood.
Which of the following statements regarding cnidarians is true?
A) Cnidarians have three true tissue layers. B) The digestive and circulatory compartment of cnidarians is called the gastrovascular cavity. C) The more stationary cnidarian body form, which is cylindrical with a ring of tentacles, is the medusa. D) Cnidarians are herbivores and can be destructive grazers on seaweeds.
Southern blotting is a technique that can be used to identify microbes that cannot be cultured.
Answer the following statement true (T) or false (F)