When the microfibrils in the cell wall are oriented in the same direction, the cell will expand in a
direction parallel to the microfibrils.
____________________ Indicate whether the statement is true or false.
F, perpendicular
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Which line in the graph represents the bag with the highest initial concentration of sucrose?
A) A B) B C) C D) D E) E
Lichens take up nutrients and pollutants from airborne dust, so many cannot survive where the level of air pollution is high. The U.S. Forest Service monitors lichens on tree trunks as part of its program to assess the health of forest communities. Lichen is a(n) ____
a. pioneer species b. indicator species c. primary succession species d. keystone species e. exotic species
If you could speed up the process of continental drift in order to witness its effects over the next 1 million years, what factors do you think would be affected? Check all that apply.
A. The intensity of solar radiation at different latitudes B. The number of extant (living) species C. Ocean circulation patterns D. The distribution of extant species E. Global climate patterns
The net movement of substances to regions of lower concentration is called
A. facilitation. B. active transport. C. diffusion. D. osmosis.