Define and give examples of several homologous structures
What will be an ideal response?
Classic examples include the forelimbs of amphibians, reptiles, birds, and mammals, which contain the same or very similar bones, but may be highly modified to suit their locomotion (e.g., the limbs of a horse, a bat, a bird, and a lizard).
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A ________ estuary has sharp boundaries between saltwater and freshwater
a. well-mixed b. partially mixed c. salt wedge d. fjord
The difference between the gray and white matter of the cerebrum is that:a
gray matter makes up the core, while white matter makes up the cortex. b. gray matter contains dendrites, while white matter contains cell bodies. c. gray matter contains unmyelinated axons, while white matter contains cell bodies. d. gray matter contains cell bodies, while white matter mostly contains myelinated axons. e. gray matter is in the right hemisphere, while white matter is in the left one.
The water pressure gradient in phloem tubes is formed by the
A) leaves being higher than the roots, which means that gravity creates pressure. B) diffusion of water from one sieve-tube cell to the next. C) loading of sugars into phloem at sources and removal of sugars at sinks. D) active transport of water from sugar sources to sugar sinks.
Which temperature group are most pathogens associated with?
A) psychrophiles B) thermophiles C) mesophiles D) psychrotrophs E) extreme thermophiles