If pollen of one species of plant lands on the stigma from another species, then ________
a. it binds but does not germinate
b. a hybrid plant is produced that may or may not survive
c. it germinates but the sperm will not fertilize the egg
d. it does not bind because it lacks the proper recognition proteins
d
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What formula correctly represents the behavior of CO2 in the blood?
A. CO2 + H2O « H2CO3 + CO B. CO2 + H+ « HCO3+ « H2O + H2CO3 C. CO2 + HCO3- « H+ + H2O + H2CO3 D. CO2 + H2O « H2CO3 « HCO3- + H+ E. CO2 + H2CO3 + O2 « H2O + CO2 + H2CO3
Whose family tree could possibly harbor the recessive allele for Tay-Sachs Disease?
a. Ian's b. Sylvia's
If 2 spot (S) is dominant to 4 spot (s), give the genotypes for the parents in the following crosses:
(a) 2 spot ? 2 spot yields 2 spot and 4 spot (b) 2 spot ? 4 spot yields only 2 spot (c) 2 spot ? 4 spot yields 2 spot and 4 spot (d) 2 spot ? 2 spot yields only 2 spot (e) 4 spot ? 4 spot yields only 4 spot What will be an ideal response?
The placement of an organism into a domain is made on the basis of
A. G + C content. B. cell ultrastructure. C. ribosomal RNA D. serological tests. E. Gram-stain reactions.