Genomic DNA sequences seem to support the idea that the first eukaryotic cell arose from within the ________ lineage.
A. bacterial
B. last universal common ancestor (LUCA)
C. viral
D. archaeal
Answer: D
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Which of the following is the proper sequence for mitosis?
a. metaphase, prophase, anaphase, telophase b. metaphase, telophase, prophase, anaphase c. prophase, metaphase, anaphase, telophase d. anaphase, metaphase, prophase, telophase e. prophase, anaphase, metaphase, telophase
Matings between individuals from the two populations of Rhagoletis produce hybrid flies that appear to be healthy and have normal life spans. The eggs laid by these hybrid flies, however, hatch less often than those of flies from either of the two populations. What isolating mechanism seems to be important in this hybrid population?
A) Prezygotic isolation B) Mechanical isolation C) Reduced hybrid fertility D) Habitat isolation
All of the following structures contribute to the ability of pathogenic bacteria to cause disease, except
A. outer membrane of gram-negative cell walls. B. capsule. C. inclusions. D. fimbriae. E. slime layer.
The function of light reactions is to
a. obtain CO2. b. make carbohydrate. c. convert light energy into a usable form of chemical energy. d. regenerate RuBP.