An unknown organism from an alien planet is observed and found to have a diploid state in every
other generation and results from fertilization. The haploid state is able to grow into a gametophytelike
structure. This alien organism most closely mimics the life cycle strategy of which of the
following earth organisms?
a. humpback whale
b. maple tree
c. fungi and algae
d. algae
e. all plants and some fungi
E
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Like ____, phosphorus can only be taken up by
plants in ____. a. carbon; ionized form b. nitrogen; compounds c. nitrogen; ionized form d. hydrogen; ionized form e. carbon; compounds
Choose the correct order of steps for the synthesis of Vitamin D
a. Inactive vitamin D is transported to the liver where it is modified. b. Inactive, chemically altered vitamin D is transported to the kidneys. c. UV light strikes the skin and converts a steroid molecule into an inactive form of vitamin D. d. Vitamin D is activated under the influence of PTH. A) a, b, c, d B) c, b, a, d C) c, a, b, d D) a, c, b, d E) d, a, c, b
Haploid sex cell; e.g., egg or sperm.
What will be an ideal response?
Chordin is an organizer protein found only in the dorsal regions of frog embryos. Removing chordin would most likely disrupt the determination of which structure?
A) central nervous system B) digestive system C) kidneys D) lungs