Paired lungs are characteristic of ____.

A. spiders
B. all birds
C. all fishes
D. all amphibian life stages
E. all insects


Answer: B

Biology & Microbiology

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The sporophyte generation is clearly larger, more complex, and longer living than the gametophyte

generation in

a. bryophytes. b. seedless vascular plants. c. seed plants. d. seedless vascular plants and seed plants. e. all plants.

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The atomic nucleus consists of

a. neutrons and electrons. b. neutrons only. c. protons and electrons. d. neutrons and protons. e. protons only.

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Upon fertilization, the egg and sperm fuse to form a single cell called a(n) ________

A) zygote B) gamete C) embryo D) gonad

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A tumor is a population of rapidly dividing and growing cancer cells that progressively does lead to mutations

a. true b. false

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