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