Which of the following traits is not characteristic of insects?
a. six legs
b. three-part body plan
c. complete digestive system
d. most species are hermaphrodites
d
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Which of the following statements is true regarding the RNA of plant viruses? Select all
A. Outside of replication, the RNA of plant viruses is typically single-stranded. B. Outside of replication, the RNA of plant viruses is typically double-stranded. C. Plants cleave viral double-stranded RNA to form small-interfering RNAs. D. Plants cleave viral single-stranded RNA to form small-interfering RNAs. E. Plant viruses contain only single-stranded DNA, not RNA.
The path to a myocardial infarction starts with a fat-filled plaque blocking a coronary artery. This condition is called ________
A) atherosclerosis B) coronary bypass C) a stent D) angioplasty
How does crossing over increase genetic diversity?
A) Crossing over increases the different combinations of genes present in a gamete. B) Crossing over allows specific genes to travel together on one chromosome. C) Crossing over increases the incidence of mutations in genes. D) Crossing over prevents the inheritance of harmful mutations.
How are Gram-positive and Gram-negative flagella different?
a. Flagella are only found in Gram-negative bacteria. b. A Gram-positive flagellum has only two rings in its basal body; Gram-negatives each have four. c. A Gram-positive flagellum does not have a membrane covering its filament; A Gram-negative flagellum does. d. Each Gram-positive flagellum contains a hook; gram-negatives do not.