Which one of the following is TRUE regarding mature human gametes?
A) produced by the process of mitosis
B) contain the haploid number of chromosomes
C) produced in the testes and oviducts
D) are also known as primary spermatocytes and primary oocytes
E) contain 46 chromosomes
B
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Metallic ions such as Ca2+, Na+, and Fe3+ readily form ____
a. polar covalent bonds b. van der Waals forces c. ionic bonds d. hydrogen bonds e. nonpolar covalent bonds
During puberty, the increased production of testosterone in males causes the rapid enlargement of which one of the following structures of the respiratory system?
A) pharynx B) esophagus C) larynx D) bronchi E) bronchioles
The preprophase band is specific to plant cells, and:a
appears after mitosis begins. b. forms inside the nucleus. c. determines the plane of cell division d. is found in both plant and animal cells. e. is composed of cellulose
Most animals seek to maximize the energy they obtain while minimizing their
A. energy expenditure. B. risk of predation and territory size. C. risk of predation. D. territory size. E. energy expenditure and risk of predation.