A molecule that binds a cell surface receptor is called a
A) peroxisome.
B) nucleic acid.
C) ligand.
D) nuclear pore.
C) ligand.
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Review the ABC model for flower development in Arabidopsis shown below. If additional B activity was expressed in all four whorls, what floral organs would develop from each whorl?
A. whorl 1: sepals; whorl 2: petals; whorl 3: stamens; whorl 4: carpels B. whorl 1: carpels; whorl 2: stamens; whorl 3: stamens; whorl 4: carpels C. whorl 1: petals; whorl 2: petals; whorl 3: stamens; whorl 4: stamens D. whorl 1: sepals; whorl 2: sepals; whorl 3: carpels; whorl 4: carpels E. whorl 1: sepals; whorl 2: petals; whorl 3: petals; whorl 4: sepals
Lethal mutations can be recovered in haploid organisms if they are
A. active. B. conditional. C. dominant. D. None of the choices are correct.
Fungi are often capable of locomotion through the use of flagella
Indicate whether this statement is true or false.
Which of the following is not exhibited by a polygamous mating system?
A. The male will kill offspring if they interfere with mating. B. The females provide care for their offspring. C. The male mates with numerous females. D. The females provide food for their offspring. E. The male defends vulnerable offspring.