Double fertilization produces a ___________ embryo and a _________ endosperm.
A. haploid, diploid
B. diploid, haploid
C. diploid, triploid
D. triploid, diploid
E. haploid, triploid
C. diploid, triploid
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Some scientists have suggested that recent outbreaks of sudden oak disease could be fought through the creation of transgenic plants with genetic resistance to sudden oak disease. What would be the source of this genetic resistance?
A. species of aphids with resistance to sudden oak disease. B. newly synthesized genes inserted into plants' genomes. C. species with unusually high levels of host plant resistance. D. domesticated apple trees adapted to North America. E. original host species in the source region of the disease.
During which stages of cellular respiration is CO2 released?
a. glycolysis b. pyruvate oxidation c. citric acid cycle d. electron transport system e. both pyruvate oxidation and citric acid cycle
Once the threshold is reached as a cell depolarizes
A) K+ channels open. B) Na+ channels close. C) an action potential is triggered. D) the interior of the cell becomes negative with respect to the outside.
The term carnivorous as applied to carnivorous plants is not considered accurate by some biologists because
A) carnivorous plants use insects for nitrogen and minerals; an organism would have to use insects as a source of energy and matter as well to be a carnivore. B) carnivorous plants only use insects as pollinators and do not gain any nutrients from them. C) carnivorous plants do not digest whole insects; an organism would have to digest whole insects to be considered a carnivore. D) carnivorous plants do not move around; an organism must be able to move to be considered a carnivore.