Most of our food crops come from angiosperms
Indicate whether the statement is true or false
TRUE
Biology & Microbiology
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When does the most rapid growth occur during pregnancy?
a. first trimester b. second trimester c. third trimester d. implantation
Biology & Microbiology
The site on an enzyme that the substrate binds to is called the ________
Fill in the blank with correct word.
Biology & Microbiology
The stacking of thylakoid membranes into grana decreases the surface area for photosynthesis.
a. true b. false
Biology & Microbiology
In order for a muscle contraction to occur, cross-bridges must form between which one of the following structures within a muscle cell?
A) the plasma membrane and the sarcoplasmic reticulum B) troponin and tropomyosin C) calcium and tropomyosin D) acetylcholine and muscle cell receptors E) actin and myosin
Biology & Microbiology