When you look at a pine or maple tree, the plant you see is a _____. |
diploid sporophyte |
All seed plants _____. |
are heterosporous |
The adaptation that made possible the colonization of dry land environments by seed plants is most likely the result of the evolution of _____. |
pollen |
Gymnosperms were most abundant during the _____. |
Mesozoic |
In gymnosperms megaspores develop into _____ . |
female gametophytes |
In pine, the embryo develops within the _____. |
female gametophyte |
The major difference between angiosperms and gymnosperms comes from the _____. |
presence or absence of a protective covering over the ovule |
Angiosperms are different from all other plants because only they have _____. |
flowers |
Unlike most angiosperms, grasses are pollinated by wind. As a consequence, some unnecessary parts of grass flowers have almost disappeared. Which of the following parts would you expect to be most reduced in a grass flower? |
petals |
Human survival literally depends on the produce of _____. |
angiosperms |
CH. 30
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