A potent neurtoxin that causes paralytic shellfish poisoning in coastal temperate North America is produced by ________.
A. dinoflagellates
B. green algae
C. red algae
D. diatoms
Answer: A
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Bone tissue is composed of ____ and ____ regions
a. spongy; muscular b. spongy; compact c. compact; diffuse d. aerobic; anaerobic e. red; white
Amino acids are linked onto a polypeptide chain by ribosomes. What carries free amino acids to the ribosomes?
a. mRNA b. tRNA c. microRNAs d. rRNA e. any form of RNA
The resolution of a microscope is
1.the ratio between the size of an image and its actual size. 2.the ability to observe two close objects as separate from each other. 3.the same as magnification. 4.the ability to determine the color of an object. 5.None of the options is correct.
The mitochondria of a eukaryotic cell is the site of
a. photosynthesis b. fatty acid metabolism c. cellular respiration d. protein synthesis