________ provides the energy required for voluntary muscle contraction in an individual's body
Fill in the blank(s) with correct word
ATP
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The circulatory systems of bony fishes, rays, and sharks are most similar to _____
A) those of birds, with a four-chambered heart B) the portal systems of mammals, where two capillary beds occur sequentially, without passage of blood through a pumping chamber C) those of reptiles, with one pumping chamber driving blood flow to a gas-exchange organ, and a different pumping chamber driving blood to the rest of the circulation D) those of sponges, where gas exchange in all cells occurs directly with the external environment E) those of humans, where there are four pumping chambers to drive blood flow
The reason that some individual hormones have so many different effects is that
a. they influence gene transcription. b. they trigger a second messenger system that produces a cascade effect. c. there are a great many different cells in different tissues that have specific receptors for the hormone. d. the hormone is carried throughout the body and only a small amount is needed to produce its effect. e. they are polar molecules.
In the GAL gene system, ________ are cis-acting regulatory elements, and ________ protein is a trans-acting regulatory protein
Fill in the blank(s) with correct word
What is a cDNA molecule?
What will be an ideal response?