Classification. The various energy levels in an atom of magnesium (24Mg) have different numbers of electrons. Use the numbers below to answer the following questions.
A.
B. The number of electrons in the first energy level
C. The number of electrons in the third energy level
D.
E.
F. The number of electrons in the second energy level
A. 1
B. 2
C. 2
D. 3
E. 6
F. 8
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A researcher in a lab finds a microscopic organism that has no nucleus, but has distinctive structural
molecules and mechanisms of photosynthesis. The organisms are abundant in virtually every habitat on Earth. The researcher has identified an organism belonging to the domain ____.
a. Bacteria b. “Protist” c. Eukarya d. Animalia e. Amoeba
The zipper-like connection between paired homologs in early prophase is known as a
A) spindle fiber. B) synaptic junction. C) synaptonemal complex. D) chiasma. E) None of the choices is correct.
The oldest fossils are typically found in the sediments ________.
A. located closest to the surface B. located close to water C. located close to human dwellings D. located deep under the surface
Monocots are the angiosperms that include grasses and lilies, as well as orchids and palms.
a. They have true woody tissue. b. They exhibit traits from both monocots and eudicots. c. They are the most abundant of all the flowering plants. d. They grow only in cold climates.