What are the three main elements on which plant growth and development depend?
a) sulfur; nitrogen; phosphorus
b) oxygen; carbon; hydrogen
c) phosphorus; nitrogen; oxygen
d) potassium; carbon; oxygen
e) nitrogen; carbon; oxygen
Ans: b) oxygen; carbon; hydrogen
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A particular virus consists of only DNA and proteins. Viruses attach to the surface of a host cell and inject the viral DNA into the host. The host cell then copies the viral DNA and makes new viruses. Eventually, the host cell is killed, and the new
viruses are released. These new viruses search for new hosts to continue the cycle. Identify and apply at least three characteristics of life to justify whether a virus is a living thing. What will be an ideal response?
Which of the following supposedly speeds the removal of lactic acid from contracting muscles?
a. Caffeine b. Growth hormone c. Phosphate loading d. Bicarbonate loading
If a particular trait has three phenotypes and one phenotype represents an intermediate, this
trait displays __________.
a. incomplete dominance b. codominance c. recessive alleles d. dominant alleles
An animal’s capacity to conserve water and to
concentrate solutes for excretion in the urine is greater in a kidney with longer a. Bowman’s capsules b. loops of Henle c. proximal tubules d. ureters e. afferent arterioles