Organisms that can manufacture their own chemical energy are called ____________.
A. autotrophs
B. heterotrophs
C. oligotrophs
D. chemotrophs
A. autotrophs
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Which of the following best describes the neuroendocrine-to-endocrine pathway of hormone action?
A) A neural organ that produces hormones regulates another gland through the release of hormones into the circulation that travel to the affected gland. B) A neural organ that produces hormones releases its hormones directly into another gland that it regulates. C) A gland releases hormones directly into a neural structure, thus regulating neural functions. D) A gland exhibits negative feedback on the nervous system by releasing hormones into neural tissue both directly and indirectly through the circulation .
The cytoplasmic membrane of Thermoplasma contains a lipopolysaccharide-like material called lipoglycan which
A) behaves like peptidoglycan and creates a strong cell wall. B) forms a monolayer that stabilizes the cytoplasmic membrane. C) contains ether linkages. D) contains ether linkages and forms a monolayer that stabilizes the cytoplasmic membrane.
"Tardigrada" means
a. tough exoskeleton. b. many proglottids. c. slow walker. d. short digestive system. e. coelom.
Deuterostomes evolved during the:a
Cambrian. b. Proterozoic. c. Paleozoic. d. Cenozoic. e. Devonian