Which is an effective strategy adopted by desert plants for survival?
A. storing toxins in stems
B. enjoying a long growing season
C. opening pores during the day
D. storing water in expandable tissues
E. having thin, flimsy large leaves
Answer: D
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Sand deposits made by ________ are well sorted and have large (tens to hundreds of feet) crossbeds. Fill in the blank(s) with the appropriate word(s)
The formation of a mid-latitude anticyclone is favored
A. on the eastern side of an upper-level trough. B. on the western side of an upper-level ridge. C. on either the eastern or western side of a trough. D. on the eastern side of an upper-level ridge.
Genetic diversity is lost in a small population when
A. Only a few individuals survive a catastrophe B. Genetic mutations cause most individuals in a population to have similar genetic makeup C. Individuals from other populations are introduced into the population and the genes are diluted D. The ecological diversity is high E. Genetic mutations cause some individuals in a population to be different in coloration or size
The biggest risk to communities surrounding mountain top removal is ________.
A. plants are difficult to regrow on the tops of reclaimed mountains B. the pure ugliness of a reclaimed mountain C. infiltrating water flows through the rock debris and picks up toxic metals and chemicals, taking them to drinking water supplies. D. landslides