A plant's first line of defense against infection is
A) cell elongation.
B) its epidermis.
C) phytochrome.
D) salicylic acid.
Answer: B
Biology & Microbiology
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Chromosomes exchange genetic information by
A. fertilization. B. mitosis. C. syngamy. D. DNA replication. E. crossing over.
Biology & Microbiology
A drawback of the morphospecies concept is that it cannot be applied to:
A. polymorphic species. B. species that are very similar in appearance. C. extinct organisms (e.g., fossils). D. polymorphic and similar-looking organisms. E. all of the answer options are correct.
Biology & Microbiology
What chemical group is found in a nucleotide but not in a nucleoside?
A.)sugar B.) nitrogen containing base C.) pentose D.) hydroxyl group E.) phosphate
Biology & Microbiology
Inbreeding will change ________
A) diet B) mating isolation mechanism C) species D) gene frequencies
Biology & Microbiology