During which phase of gamete production do sister chromatids separate?
a. meiosis I
b. meiosis II
c. fertilization
d. mitosis I
e. mitosis II
ANSWER: b
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Which group of organisms is thought to be responsible for the corrosion of submerged metal structures and oil pipelines?
A) fermentative microorganisms B) acidophilic iron-oxidizers C) sulfate reducers D) hydrocarbon-degrading anaerobes
Cats, dogs, and fish are consumers that have the ability to move actively from one place to another
These organisms belong to the ____ kingdom.
a. Plantae b. Fungi c. Animalia d. “Protist” e. Bacteria
Which of the following is the most direct measure by which ventilation is regulated?
1.carbon dioxide levels in the blood
2.acid levels in the cerebrospinal fluid
3.oxygen levels near the carotid bodies
4.oxygen levels near the aortic bodies
Genes can be duplicated when a processed messenger RNA, from which introns have been spliced out, is reverse-transcribed to form a double-stranded DNA segment that is reintegrated into the main chromosome
What is the name for this process that may form nonfunctional pseudogenes?