What is active transport?
A) Movement of molecules into or out of a cell down a concentration gradient
B) Rapid movement of molecules in a solution
C) Movement of molecules into or out of a cell against a concentration gradient
D) Movement of molecules into or out of a cell using special proteins and not requiring an expenditure of energy
E) Diffusion of molecules within a cell
C
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Protists and bacteria are grouped into different domains because _____
A) protists eat bacteria B) bacteria are not made of cells C) protists have a membrane-bounded nucleus, which bacterial cells lack D) bacteria decompose protists E) protists are photosynthetic
What cavities develop from the ventral cavity?
A. thoracic, abdominal, and pelvic B. cranial and thoracic C. pelvic and abdominal D. cranial and vertebral E. cranial, vertebral, and thoracic
If a hiker picked up a mollusk on a trail in a rain forest, what class would it belong to?
A. Polyplacophora B. Cephalopoda C. Gastropoda D. Bivalvia
Translate the correct answer from the above question into tRNA.
A. CCA - TAT - TCG B. CCA - UAU - UCG C. GGU - AUA - AGC D. GGT - ATA - AGC