Members of the ____ lineage, including slugs and snails, may have a shell, and most undergo torsion during
development.
a. Cephalopoda
b. Polyplacophora
c. Platyhelminthes
d. Gastropoda
e. Scaphopoda
ANSWER: b
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Answer the following statements true (T) or false (F)
1. Although not well understood, the Cambrian Explosion most likely occurred due to changes in sea level and continental drift. 2. The first bilateral animal emerged during the Ordovician Period. Fossils of this organism were discovered in South Africa. 3. The eukaryotic genome is comprised entirely of genes derived from Archean ancestors. 4. Molecular homologies indicate that living species evolved from a common ancestor or interrelated group of common ancestors.
Osmosis can be characterized as: a. associated with an organism's salinity
b. a very important and challenging part of a marine organism's survival. c. all of these choices. d. the movement of water across a membrane due to solute concentrations.
Which nucleic acid acts like an enzyme, stabilizing and orienting different molecules to facilitate the formation of bonds between them?
A) DNA B) rRNA C) tRNA D) mRNA
For each glucose molecule broken down in aerobic respiration, about how may ATPs are produced?
A) 2 B) 4 C) 30 D) 36 E) 38