Crossing over occurs during _____ of meiosis
1.prophase I
2.metaphase I
3.anaphase I
4.prophase II
5.metaphase II
1
Biology & Microbiology
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Compared to uric acid, producing urea as the main form of nitrogenous waste requires ____
a. more energy and water b. less energy and water c. more energy and less water d. the same amount of energy and water e. less energy and more water
Biology & Microbiology
Which of the following were the first vertebrates to live and reproduce in dry environments?
A. fish B. amphibians C. birds D. reptiles E. mammals
Biology & Microbiology
Ultraviolet (UV) light-treated bacteria would have increased DNA damage in the form of
A) analog incorporation. B) pyrimidine dimer formation. C) intercalation of the bases. D) direct transition of the bases. E) deamination.
Biology & Microbiology
Fish have _____ chambered hearts
A) 1 B) 2 C) 3 D) 4
Biology & Microbiology