Who is credited with first observing microorganisms?

A) Robert Hooke
B) Anton van Leeuwenhoek
C) Robert Koch
D) Louis Pasteur
E) Carolus Linnaeus


B

Biology & Microbiology

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With the use of effective vaccines, polio has

become a very rare disease and far fewer people get polio than once did. This is an example of ____ selection

a. directional b. stabilizing c. disruptive d. mutational e. infrequent

Biology & Microbiology

Which of the following substances found in C4

plants has four carbon atoms? a. phosphoglycerate (PGA) b. ribulose bisphosphate (RuBP) c. phosphoglyceraldehyde (PGAL) d. glucose e. oxaloacetate

Biology & Microbiology

Which of the following statements about infanticide

is true? a. It may decrease the reproductive success of the male lion that carries it out. b. It occurs in very few human cultures. c. The presence of a male unrelated to a child in an American household and the absence of the biological father significantly increase the child’s risk of dying by age two. d. A mother might decrease her fitness by infanticide in a situation where resources or social attachments are absent. e. None of these are true.

Biology & Microbiology

A group of thylakoid discs make up what part of a chloroplast?

a. lumen b. stroma c. granum d. vacuole e. mesophyll layer

Biology & Microbiology