True or False: Vertebrates may have an external skeletal system
A. true
B. false
B
Biology & Microbiology
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Which are tetrapods? Check all that apply.
_____ frogs _____ snakes _____ birds _____ humans _____ lungfish
Biology & Microbiology
An individual who avoids the pull of gravity is exhibiting
a. negative phototaxis. b. positive geotaxis. c. negative geotaxis. d. positive thigmotaxis.
Biology & Microbiology
Spontaneous hydrolysis reactions between DNA and surrounding water molecules commonly cause
A) pyrimidine dimer formation. B) depurination. C) tautomeric shift. D) double-stranded DNA breaks. E) deletion mutations.
Biology & Microbiology
The body fluids of an osmoconformer would be _____ with its _____ environment
A) isoosmotic; freshwater B) hyperosmotic; saltwater C) isoosmotic; saltwater D) hypoosmotic; saltwater
Biology & Microbiology