Which group of terms is in the correct developmental sequence?
a. microspore mother cell, meiosis, megaspore, female gametophyte.
b. microspore mother cell, meiosis, microspore, pollen grain.
c. megaspore, mitosis, female gametophyte, meiosis, endosperm mother cell.
d. all of the above.
b
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Fluctuations in air pressure, often caused by vibration of an object, are known as:
A. light energy B. sound waves C. ultraviolet radiation D. a nerve impulse
The ____ phylum contains one living vascular, seed-bearing plant species – a deciduous tree with fan-shaped leaves.
It has separate male and female plants, and the males are often planted in cities because of their resistance to pollution, insects, and disease.
a. Cycadophyta b. Anthophyta c. Gnetophyta d. Coniferophyta e. Ginkgophyta
Myofibril contractile subunits, the sarcomeres, are bounded on each end by a disc of protein called the
A. A band. B. M line. C. H band. D. I band. E. Z line.
Bacteria are most essential in the cycling of:
a. carbon. b. water. c. phosphorus. d. nitrogen. e. energy.