All cells of the human body contain 23
a. pairs of chromosomes.
b. chromosomes.
c. pairs of genes.
d. genes.
e. alleles.
Question 2
Doris works a stressful job, has difficulty falling asleep, and she often wakes up early. After several weeks, she agrees to participate in a sleep study to determine whether she has insomnia.
It is likely that the results of her sleep study show Doris:
a. spends less time sleeping as people who do not complain of insomnia.
b. is lacking in the substances that promote and maintain sleep.
c. spends as much time sleeping as people who do not complain of insomnia.
d. has an excess of arousal-producing neurochemicals.
The use of bacteria to make human insulin
The trilobite body is divided into three major sections
Embryonic cells form the placenta
Human hand and wrist anatomy
A Human Cell
Respiration in human