If a hydrogen atom gains an electron then _____.
A) it becomes an isotope
B) its mass number changes
C) its atomic number changes
D) it acquires a negative charge
D) It acquires a negative charge
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To analyze genetic variation in populations, one approach is to consider the frequency of alleles. When calculating an allele frequency for a diploid species, how many copies of an allele are present?
A. 1 B. 2 C. 3 D. 4 E. 5
Each motor unit is composed of ____
a. both slow and fast aerobic muscle fibers b. both fast aerobic and anaerobic fibers c. all types of muscle fibers mixed together d. only one type muscle fiber e. both slow and fast anaerobic muscle fibers
Blood pressure depends on:
a. the height and weight of an individual. b. atrial volume and stroke rate. c. blood flow and resistance of blood against the vessel walls. d. total blood volume. e. heart rate.
A hypertonic solution is one that _____________
Fill in the blank(s) with the appropriate word.