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Seedy Section of the Forest
Angiosperms and Gymnosperms
"Seed plants are everywhere you look! All flowering plants are seed plants, as well as corn, wheat, and just about all trees. So see how much you know about them! This quiz is a bit intense on the biology, but you can do it!"
15 Points Per Correct Answer - No time limit
Believe it or not, the development of seeds was a major step in the evolution of plants. First to develop were 'naked' seeds (not surrounded by fruit), which can be found among the conifers and other plants of what taxonomic division?
The next big advance, seedwise, was the evolution of flowering plants which surround their seeds with lovely nutritious tissue (aka fruit). To what division do these plants belong?
Well, seeds are very nice, but you still have to have two parents. In plants, the parents are haploid gametophytes (the male gametophyte is often contained in a grain of pollen), and they produce a diploid sporophyte, which in turn produces gametophytes of both genders. What is this pattern called?
the Krebs Alternation
alternation of generations
In flowering plants, the zygote is only one fertilization product. The other, the product of an event called 'double fertilization,' is a triploid cell that arises from the union of one sperm cell with two polar nuclei from the embryo sac. What is this triploid cell called?
Flowering seed plants are often divided into two groups: monocotyledons and dicotyledons. What does 'cotyledon' mean?
vein structure (on surface of leaf)
The earliest known seed plant, Elkinsia polymorpha, appeared in what geologic time period?
An unfertilized seed is partially surrounded by an integument (or protective layer). The hole in the integument is what pollen enters through; what is this opening called?
What is the process in which a seed begins to grow into a plant?
The integument, or protective layer surrounding a seed, is also known by which of these less scientific-sounding names?
Seed plants evolved in the oceans and only later made the transition to land.
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Compiled May 23 13