Microfilaments are assembled from the protein ____
a. keratin
b. myosin
c. laminin
d. actin
e. tubulin
D
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For which of the following set of variables,a chi square test should be applied?
A. Either dependent or independent variable is a discrete variable. B. Discrete dependent variable and continuous independent variable C. Both dependent and independent variables are discrete variables. D. Discrete independent variable and continuous dependent variable.
Monkeys and humans share many of the same DNA sequences and have similar proteins, indicating that:
a. the two groups belong to the same species. b. the two groups share a relatively recent common ancestor. c. humans evolved from monkeys d. monkeys evolved from humans e. the two groups first appeared on Earth at about the same time.
A measurement of a microbe is reported as 1 × 10-6 m, also known as
A) centimeters (cm). B) millimeters (mm). C) micrometers (?m). D) nanometers (nm). E) yards.
A newly discovered unicellular microbe has a nucleus containing linear chromosomes and surrounded by a membrane. It has mitochondria, 80s ribosomes, and is covered by cilia. There is no cell wall external to the plasma membrane. This organism most likely would be a/an ________.
A. protozoan B. fungus C. algae D. bacterium E. archaeon