The first vertebrates to invade land were
A. arthropods.
B. reptiles.
C. amphibians.
D. birds.
Answer: C
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The polysaccharide that helps strengthen cell walls in transport tissues of hornworts is called ____
a. xylan b. chlorophyll c. lignin d. chlorophyll a e. chlorophyll b
Most marine animals have an osmolarity of about ____ mOsm/L
a. 5 b. 225 c. 300 d. 1000 e. 1500
Does Andrew have a reason to be concerned about developing Huntington's Disease?
a. Yes, absolutely. b. No, he has no reason to be concerned c. Perhaps, but the likelihood is remote. d. Not enough information is given
Which of the following statements about genomic libraries and cDNA libraries is TRUE?
A. A genomic library is made using reverse transcriptase. B. A cDNA library is derived from mRNA and is made using reverse transcriptase. C. A genomic library is derived from mRNA. D. A cDNA library is derived from chromosomal DNA. E. A genomic library is derived from mRNA and is made using reverse transcriptase.