Cellular pH is kept near a value of 7 because of

a. salts.
b. buffers.
c. acids.
d. bases.
e. water.


B

Biology & Microbiology

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When determining whether a relative is a proper match for organ or tissue donation, three sets of HLA alleles - inherited together - must match those from the intended recipient. These allele sets are known as _____

a. open reading frames b. splice sites c. copy number variants d. haplotypes e. disease-associated mutations

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In the diagram of a root tip shown above, the item labeled "4" is the

a. quiescent center. b. zone of cell division. c. zone of elongation. d. root cap. e. zone of maturation.

Biology & Microbiology

A cell type that secretes skeletal support

elements and digests and transports food is indicated by a. A. b. B. c. C. d. D. e. E.

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Considering organisms from the species level to the phylum level there is an increase in

A. unity. B. diversity C. structural similarity. D. color similarity.

Biology & Microbiology