Which organelle converts the chemical energy stored in food into compounds that are more convenient for the cell to use?
A. chloroplast
B. Golgi Apparatus
C. endoplasmic reticulum
D. mitochondrion
Ans: D. mitochondrion
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The immune system is capable of mounting specific responses to particular microorganisms because ________
A) lymphocytes are able to change their antigen specificity as required to fight infection B) the body is able to determine which type of B and T cells to make C) the body contains an enormous diversity of B and T cells, each with a specific kind of antigen receptor D) the body is able to make different antigen receptors depending on the invading microorganism
_____ is an example of a proto-oncogene
Fill in the blank(s) with the appropriate word(s).
During exercise, the skeletal muscles receive
__________ blood, the brain receives __________ blood, and the gut receives __________ blood than at rest. a. more; the same amount of; less b. more; less; less c. the same amount of; the same amount of; less d. the same amount of; the same amount of; more e. less; more; less
The ________ is the innermost layer of the eye that is lined with almost a quarter-billion photoreceptors
Fill in the blank(s) with correct word