What type of organisms can generate organic molecules and obtain energy from inorganic molecules like iron, sulfur, and hydrogen?
a. chemoautotrophs
b. photoautotrophs
c. heterotrophs
d. homotrophs
e. organotrophs
A
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To see objects smaller than those that can be resolved by a light microscope, we usually use microscopes that employ a beam of:
a. electrons b. photons c. protons d. neutrons e. X-rays
In the image above, the substance indicated as "C" is a(n) _____
a. inhibitor b. regulatory molecule c. substrate d. coenzyme e. cofactor
©McGraw-Hill EducationConsider the cladogram shown. Based on this cladogram, which species has the greatest number of ancestral character states?
A. 1 B. 2 C. 3 D. 4 E. 5
Eukaryotic cells can't simply split in two because _____.
A) their DNA is contained within a single nucleus B) they have a single mitochondrion that must first be replicated C) eukaryotic organelles must be equally divided among the daughter cells D) all of the choices make simple fission unworkable