Circular rings of smooth muscle that can contract to regulate the movement of food through the gastrointestinal tract are called ________

Fill in the blank(s) with correct word


sphincters

Biology & Microbiology

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Meiosis in flowering plants gives rise to cells that are ____

a. haploid gametophytes b. diploid sporophytes c. sporophytes that can be haploid or diploid d. diploid gametophytes e. haploid sporophytes

Biology & Microbiology

A deficiency of vitamin C can result in ____

a. anemia b. beriberi c. night blindness d. rickets e. scurvy

Biology & Microbiology

An amino acid contains all of the following except a/n ________.

A. variable R group B. carboxyl group C. ? carbon D. phosphate E. amino group

Biology & Microbiology

Which event is associated with leaf abscission?

a. Chlorophyll breaks down. b. Anthocyanins degrade. c. Carotenoids are transported from the leaves. d. Sugars accumulate in the leaves. e. Leaves turn dark green.

Biology & Microbiology