All mammals are viviparous
a. true
b. false
Ans: b. false
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Why was it important in the studies of Beadle and Tatum that Neurospora is haploid?
a. Because it is easier to grow haploid molds in the laboratory. b. Because haploid molds have simpler nutritional requirements than do diploid molds. c. Because a mutation that arises is not masked by a normal allele on a homologous chromosome. d. Because haploid Neurospora will always mutate. e. Because diploid Neurospora will always mutate.
The concept of a species was proposed by
A. Charles Darwin. B. John Ray. C. Carolus Linneaus. D. Erasmus Darwin. E. George Cuvier.
Eukaryotic cells have their DNA enclosed in the _____
a. plasma membrane b. nucleus c. nucleoid d. nuclear envelope e. nucleotide
Which of the following organisms causes malaria?
a) Trypanosome b) Entamoeba c) Dinoflagellates d) Plasmodium e) Stentor