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BIOL 2321- EXAM 1 QUESTIONS AND ANSWERS

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BIOL 2321- EXAM 1 QUESTIONS AND ANSWERS

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BIOL 2321- EXAM 1 QUESTIONS AND
ANSWERS

What is a microbe? - Correct Answers -a microscopic organism
-contains a genome
-Cellular, living microorganisms such as bacteria, archaea, fungi, protists, and helminths
(parasitic worms)
-Nonliving/noncellular entities such as viruses and prions (infectious proteins)
-Microorganisms that are not microscopic such as some fungi (yeast), helminths, and
protists (however, part of their life cycle is microscopic)

What is not a microbe? - Correct Answers --Multicellular "micro-animals"
-cells compromising tissues

Robert Hooke - Correct Answers --first microscope (30x)
-macroscopic life (insects, molds)

Antoine van Leeuwenhoek - Correct Answers --first to observe single-celled microbes
((animalcules)

Metagenomics - Correct Answers -Method to discover and identify microbes without
culturing them

Spontaneous Generation - Correct Answers --the mistaken idea that living things arise
from nonliving sources
-lifee from non-life; abiogenesis

Francesco Redi (1600s) - Correct Answers -Disproved spontaneous generation for
macroscopic life

Prokaryotes - Correct Answers --bacteria and archaea
-lack nucleus and organelles
-single cell chromosome
-asexual reproduction
-cell wall is common

-diverse metabolisms: autotrophs and heterotrophs
-archaea: "extremophiles"

Eukaryotes - Correct Answers --fungi and protists
-larger, possess nucleus, organelles
-reproduce asexually or sexually

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