12) gene therapy in humans has been used to treat
a. cystic fibrosis.
b. cancer.
c. inborn errors of metabolism.
d. all of the above.
e only two of the above.
13) which of the following statements is not correct about the arrangement of tissues in
the eudicot root?
a. the specialized root tissues are seen at the zone of maturation.
b. the epidermis of the root has no cuticle on its outer surface, unlike other epidermal
tissues.
c. the pericycle is the outer layer of cells in the vascular cylinder, with the ability to
form secondary or branch roots.
d. the star-shaped phloem is located in the center of the vascular cylinder, with xylem
arranged between the arms of phloem.
e. the casparian strip is a waxy lining on four sides of the cells of the endodermis, which
forces water into the endodermal cells.
14) the electrons are unequally shared in _______, and transferred in __________.
a. ch4, na+cl-
b. o2, ch4
c. na+cl-, h2o
d. h2o, n2
15) which of the following is/are true about sexual reproduction?
a. at the cellular level is the opposite of reproduction since it involves two cells fusing
to become one.
b. it requires the development of organs such as the uterus, which are of no immediate
survival advantage to the individual but are advantageous to the species.
c. it regularly produces a wider array of adaptations to the external environment in a
shorter period of time.
d. it regularly produces a wider array of adaptations to the internal environment (disease
agents, parasites) in a shorter period of time.