Which of the following statements is false? a. vitamin a supplements can sometimes cure nyctalopia because vitamin a can be converted into retinal. b. nyctalopia affects vision in the fovea centralis, resulting in impaired vision. c. retinitis pigmentosa is a disorder in which the discs released from rods are not properly phagocytized. d. all of the listed responses are false.

Ashort, vertical, solid, or fleshy stem possessed by gladiolus and which is used in reproduction is termed a . termed a .

What are examples of the plant life and animal life that can be found in each type of terrarium

Which of the following factors would not contribute to allopatric speciation? a) a population becomes geographically isolated from the parent population. b) the separated population is small, and genetic drift occurs. c) the isolated population is exposed to different selection pressures than the ancestral population. d) different mutations begin to distinguish the gene pools of the separated populations. e) gene flow between the two populations is extensive.