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