The type of exercise that creates new blood vessels and makes the heart pump more efficiently is ________
Fill in the blank(s) with correct word
aerobic
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The humoral immune system involves cells in the immune system.
a. true b. false
Energy is commonly defined as ____.
A. a form of heat B. thermodynamics C. the capacity to change D. the capacity to do work E. the ability to do work
In a 32-cell stage tunicate embryo, if the vegetal marginal cells lack a functional FGF receptor, which structure(s) will fail to develop? (Select all that apply)A) notochordB) mesenchymeC) muscleD) nerve cord
What will be an ideal response?
Can a blue crab find its identical twin?
A. No, spiral cleavage is determinate. B. Yes, crab larvae reproduce via mitosis. C. No, arthropods are deuterostomes, and twinning only occurs in protostomes. D. Yes, the separation of embryonic cells is rare but not lethal.