What would be strong evidence to suggest a protist is phagotrophic?
A. Benthic lifestyle
B. Silicon dioxide cell walls
C. An abundance of lysosomes
D. Presence of chloroplasts
E. Locomotion using polar flagella
Answer: C
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Which of the following is TRUE of both T cells and B cells?
A. They are lymphocytes. B. They recognize specific antigens on the cell surface. C. They have class I MHC molecules on their cell surface. D. They are involved in the humoral immune response. E. All of the responses are correct.
What are the primary sources of compounds used to develop antibiotics?
a. tree and flower extracts b. snake and scorpion venom c. bacteria and fungi d. fermented fruit sugars
Mutations are the original source of new alleles, but may be adaptive, __________ or __________. Fill in the blank(s) with the appropriate word(s)
single DNA molecule runs half the length of a human chromosome; the rest of the chromosome
consists of protein. Indicate whether the statement is true or false.