Number 5 indicates a(n)
A. hair shaft.
B. eccrine gland.
C. hair follicle.
D. hair matrix.
E. epidermal ridge.
Answer: C
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How are male and female reproductive systems functionally different?
The scrotal location of the testes provides the cooler environment essential for spermatogenesis
Indicate whether the statement is true or false
White blood cells differ from red blood cells because only they contain ________
A) a biconcave shape B) a nucleus and most organelles C) the ability to transport both oxygen and carbon dioxide D) the iron-containing molecule called hemoglobin E) cytoplasm
What is the location of the internal pacemaker that sets biological rhythms?
A. suprachiasmatic nucleus of the brain B. ventricles of the heart C. endocrine gland in the gonads D. photoreceptors of the eye E. the adrenal glands