What is/are the role(s) of clia in a ciliate?
A. Direct food particles toward the cytostome
B. Assist with cell fusion in sexual reproduction
C. Move the organism through a liquid environment
D. Adhere to surfaces
Answer:
A. Direct food particles toward the cytostome
C. Move the organism through a liquid environment
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An individual that is a genetic mosaic would be the result of a germ cell mutation
Indicate whether the statement is true or false
Suppose you wanted to investigate ideas on how polymerization of prebiotic organic molecules may have occurred on the early Earth, which of the following scenarios might best be utilized for this?
A. Mix some RNA nucleotides in water and heat them to boiling temperatures. B. Mix some amino acids (protein building blocks) in water and add a strong acid or a strong base. C. Mix some RNA nucleotides in water and repeatedly wet and dry them on clay. D. Mix some amino acids (protein building blocks) in water and add a bacterium harmless to humans. E. Mix some amino acids in salt water and cool down to 0C.
Egg yolk and seed endosperm are examples of passive parental care
Indicate whether the statement is true or false.
A mutation in the promotor region of a gene can result in cancer. Which of these scenarios results in cancer?
a. The mutation is in the promoter region for an enzyme that metabolizes starch, such as amylase. Starch digestion is disrupted. b. The mutation is in the promoter region for a protein that controls rebuilding of the telomeres. As a result, these cells die prematurely. c. The mutation is in the promoter region for a protein that controls a key gate-keeper in the cell cycle. Without the gate-keeper, the cell blows through that checkpoint and continues with growth, unchecked. d. The mutation is in the promoter region for a calcium channel in the cell membrane of bone cells. The result of the mutation is a buildup of excess calcium in the extracellular space.