Which type of gland can become blocked and form a "blackhead"?
A. sebaceous
B. sudoriferous
C. sweat
D. endocrine
E. compound
Answer: A
Biology & Microbiology
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One line of evidence for endosymbiosis is that chloroplasts resemble ____
a. anaerobic bacteria b. aerobic bacteria c. fungi d. protists e. cyanobacteria
Biology & Microbiology
Breathing rates are automatically increased when _____ levels are _____
a. oxygen; high b. carbon dioxide; high
c. oxygen; low d. carbon dioxide; low e. ATP; low
Biology & Microbiology
Which of the following statements relate to natural selection?
A) differential reproductive success B) competition for resources C) heritable variation D) breeding to increase the frequency of desired traits E) fitness
Biology & Microbiology
How many types of amino acids human body needed to build proteins?
a. 11 b. 20 c. 2 d. 46
Biology & Microbiology