____________________ are stems that branch from the main stem of the plant and grow horizontally on the ground.
Fill in the blank(s) with the appropriate word(s).
Stolons
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Where does meiosis occur in a flowering plant? I) megasporocyte II) microsporocyte III) endosperm IV) pollen tube
A) only I B) only II C) only III D) I and III E) I and II
Most radiolaria have an internal skeleton made of
A. glycoproteins. B. cellulose. C. siliceous material. D. microtubules.
If there were a high allele frequency for the CCR5-32 coreceptor, and the rate of infection with HIV was high as well, one would expect the frequency of the CCR5-32 coreceptor allele to ________
A) remain the same due to the lethality of AIDS B) remain the same due to the population maintaining Hardy-Weinberg equilibrium C) fall quickly due to heterozygote selection D) rise quickly and confer resistance on a large part of the population
In an organism such as a sea urchin, administration of actinomycin D prevents RNA synthesis. However, early development up to gastrula formation can take place in the presence of actinomycin D but gastrulation cannot. This implies that __________
A) development beyond gastrulation requires actD B) actD is part of the normal environment of a sea urchin and serves as a developmental signal molecule C) actD receptors begin to form only on cell surfaces of the gastrula D) maternal effect genes regulate development until gastrulation E) immature sea urchin embryos produce actD to regulate further development