Speciation occurs more frequently when populations undergo a period of geographic isolation
a. true
b. false
Answer: a. true
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Which of the following would describe the action of a chemical compound considered to be a mutagen?
A. Most are reactive and add bulky side groups to DNA bases. B. Most are able to bypass DNA repair mechanisms. C. Most are reactive and add bulky side groups to RNA bases. D. Most interfere with DNA replication. E. Most interfere with DNA transcription.
Cells of bone tissue
What will be an ideal response?
Most of the oxygen in the blood is transported
A) by white blood cells. B) in the plasma. C) as bicarbonate ions. D) bound to hemoglobin. E) combined with carbon dioxide.
The organism Phytophthora infestans, responsible for the Irish Potato Famine of 1845 and 1847, belongs to
A. Stramenopila. B. Euglenozoa. C. Alveolata. D. Rhodophyta. E. Chlorophyta.