Loams are soils with the best water and oxygen
penetration because they have
a. a high proportion of sand.
b. a high proportion of silt.
c. a high proportion of clay.
d. high proportions of sand and silt and a low
proportion of clay.
e. equal proportions of sand, silt, and clay
E
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Which of the following is a fitness trade-off (compromise)?
A) In some hornbill species, the male helps seal the female in a tree with her nest until the young are ready to fledge. B) Hummingbirds are the best pollinators of certain flowers, but bees are the best pollinators for orchids. C) The strong, thick beak of a woodpecker helps it find insects in trees. D) Turtle shells provide protection but are heavy and burdensome when moving.
Otto Loewi demonstrated that neurons transmit signals across synapses
a. by electrical signals. b. by Vagusstoff. c. by acetylcholine. d. by chemical signals. e. by proteins
What would result if an error inside gastrulation caused too few cells inside the archenteron?
A. Too little endoderm, resulting in missing gut and organs B. Too little ectoderm, resulting in missing nervous system or skin C. Problems in muscle development D. Too little protoderm, resulting in missing organs Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about the fate of the archenteron? What other information is related to the question? Choose Answer Given what you now know, what information is most likely to produce the correct answer? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
During plant succession, animals can quickly lose their habitat by vegetation change
Indicate whether the statement is true or false