Nitrogenous waste products, such as urea and uric acid, are primarily formed because of the digestion of
A) lipids. B) carbohydrates. C) salts. D) proteins.
D
Biology & Microbiology
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Which of the following invertebrates is most
closely related to vertebrates?
a. lancelets b. tunicates c. sea stars d. earthworms e. leeches
Biology & Microbiology
The continuous, low-level extinction rate of species is sometimes called:a
mass extinction. b. minimal extinction. c. selective extinction. d. temporal extinction. e. background extinction.
Biology & Microbiology
Ringworm is caused by a(n)
A) fungus. B) cestode. C) nematode. D) protozoan. E) trematode.
Biology & Microbiology
Mendel's work was presented in ________ but not recognized and rediscovered until ________
A) 1890; 1920 B) 1800; 1900 C) 1865; 1900 D) 1850; 1900 E) 1825; 1950
Biology & Microbiology