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15 Cards in this Set
- Front
- Back
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If water molecules (H2O) suddenly stopped forming hydrogen bonds with one another, how would water transport in vascular plants change (if at all)? |
It would stop, as water transport relies on H2O molecules being connected by hydrogen bonds. |
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The veins of leaves are |
1) composed of xylem and phloem 2) continuous with vascular bundles in the stem and 3)roots finely branched to be in close contact with photosynthesizing cells |
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Roots elongate continuously in order to |
mine new regions of soil for minerals |
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If the two guard cells of a stoma decrease their concentration of potassium (K+) ions, what will happen to the corresponding pore? |
The pore will close, preventing the diffusion of CO2 out of the leaf. |
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Root hairs on a root develop |
after the cells elongate |
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In a sunflower population, a mutation arises that results in vessels 4 times wider than wild-type. The mutants will have _________ water-transport capacity, but will also be more susceptible to _________. |
higher; cavitation from freezing |
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Which of the following statements is true of the seeds of both gymnosperms and angiosperms? |
diploid 2n embryo |
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A high school student is carrying out a science project. She plants alfalfa seeds, and encloses an area planted with one set of alfalfa seeds within a box covered in red cellophane (which reflects light of red wavelengths). She leaves another set of planted alfalfa seeds uncovered. What do you expect she’ll find in these two alfalfa populations when her science project is over? |
The germination rate will be higher in the uncovered seed set. |
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In ferns, both the gametophyte and sporophyte are physiologically capable of surviving on their own. What is the most likely reason that vascular tissues are present only in the sporophyte generation? |
There is no advantage for the gametophyte to grow tall because gametes must be produced near the ground where the water needed for their free-swimming sperm is most likely to be found. |
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Which of the following correctly describes the "moss" we see when we walk in the woods? |
haploid gametophyte |
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bark inside a tree |
phloem |
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the multicellular gametophytes of bryophytes are haploid. |
true |
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You find a green organism in a pond near your house and believe it is a plant, not an alga. Which line of evidence would definitively support your hypothesis? |
surrounded by the cuticle |
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Which of the following statements is true about all green algae? |
They have a wide variety of growth forms, ranging from single cells to multicellular. They occur in a variety of habitats ranging from marine to damp tree trunks. They have chlorophyll a, chlorophyll b, cellulose in their cell walls, and starch as a storage product. All of the above.Only “a” and “c” |
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In the life cycle of most modern green algae, the zygote_______________________ before it releases spores. |
does not undergo further cell division |
