A gene that determines the heaviness of a man's beard is

A) X-linked.

B) sex-limited.

C) sex-influenced.

D) Y-linked.


B) sex-limited.

Biology & Microbiology

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Research has shown that commercial fisheries place selective pressure on fish populations by

harvesting mostly the ____ fish, resulting in ____.

a. young; aging populations b. larger; maturity at smaller sizes c. smaller; maturity at larger sizes d. prereproductive; declining birth rates e. postreproductive; no change in population size

Biology & Microbiology

The main function of salivary mucus is to ____

a. break down starch b. mechanically breakup food materials c. make the food particles sticky d. hydrate dry food particles e. coat food particles so they slide down the esophagus

Biology & Microbiology

Which cell is the most abundant in the human body?

a. lymphocytes b. basophils c. erythrocytes d. neutrophils e. platelets

Biology & Microbiology

The most fundamental grouping in the classification of living organisms is the _____

a. class b. genus c. family d. order e. species

Biology & Microbiology