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13 Cards in this Set
- Front
- Back
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Root hairs develop not at the very tip of roots l, but instead at a slightly older region( the region of cellular maturation). What would be the impacts if root hairs developed at the very TIP of roots? |
The root hairs would likely be torn off as root cells elongated. |
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You hammer a nail into a tree trunk 10 ft above the ground (and the tree is currently 20 ft tall) the tree grows taller at a rate of 2 feet per year. How far above ground level will the nail be in ten years |
10ft |
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What is responsible for the growth rings found in tree trunks? |
Seasonal activity of the vascular cambium |
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A tree will likely die if the bark is stripped off around the entire circumference of the tree. Why? |
Phloem cells will likely be removed and, as a result sugars would no longer be able to be transported from the leaves down to the roots and the roots would die. |
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Sucrose tends to be more concentrated in companion cells than in the photosynthetic cells where is it produced |
Sucrose is actively transported from the photosynthetic cell to the companion cells |
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Which of these choices best describes how pressure is generated that drives the flow of sugars from leaves down through the rest of the plant? |
Sucrose is transported into phloem cells located in the leaves, water then enters the phloem by osmosis. This causes an increase in turgor pressure in the phloem cells located in leaves |
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An aphid attaches itself to the surface of a stem and pierces the stem with its mouthpart (called the stylet) a droplet of clear, sugary liquid then begins to protrude from the back end of the aphid. How can this be explained? |
The aphids stylet has tapped into the phloem and the pressure from the phloem forced sugar water all the way through the aphids body. |
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How could you definitively determine that an organism you are examining is a plant rather than a alga |
It has a waxy cuticle |
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A plant with the most efficient water transport should have cells with |
Gaps in the ends of the cells where both the primary and secondary cell walls are missing |
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You see a megasporangium. You are most likely examining the reproductive structures of _____ |
A pine cone |
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As an introductory biology student, you know that angiosperms are unique among plants in that they produce fruits and flowers. How else could you be sure that a plant is a angiosperm? |
It's seeds are inside an encapsulated structure |
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Which of these structures represent gametophytes |
Pollen and embryo sacs |
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What is the function of pollen tubes |
They carry two sperm to an embryo sac. One sperm fertilizes the egg cell, and the other sperm fertilizes polar nuclei |
