What does biological ancestry describe?
A) the ancestors from whom mitochondria were inherited
B) interaction between different generations in a population
C) the ancestors from whom specific alleles of nuclear genes were inherited
D) family trees or pedigrees
D) family trees or pedigrees
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The major excretory organ(s) of the human urinary system is/are the
A. gallbladder. B. pancreas. C. liver. D. adrenal gland. E. kidneys.
In the water cycle, animals return water to the environment by
A. transpiration and excretion. B. excretion. C. transpiration. D. evaporation and excretion. E. evaporation.
The three most common atoms in your body are
a. hydrogen, oxygen, and carbon. b. carbon, hydrogen, and nitrogen. c. carbon, nitrogen, and oxygen. d. nitrogen, hydrogen, and oxygen. e. carbon, oxygen, and sulfur.
Which particle is able to freely cross the plasma membrane?
a. Na+ b. Clc. oxygen d. glucose e. amino acids