Hox complexes in mammals are homologous to invertebrate ______
A. zygotic genes
B. segmentation genes
C. homeotic genes
D. maternal effect genes
C
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Four of the five answers listed below are bacterial structures. Select the exception
a. cell wall b. pilus c. capsule d. protein coat e. plasma membrane
Singer and Nicolson's fluid mosaic model of the membrane proposed that membranes_____
A) are a phospholipid bilayer between two layers of hydrophilic proteins B) are a single layer of phospholipids and proteins C) consist of protein molecules embedded in a fluid bilayer of phospholipids D) consist of a mosaic of polysaccharides and proteins
Three "turns" of the Calvin cycle generate a "surplus" molecule of glyceraldehyde 3-phosphate (G3P). Which of the following is a consequence of this?
A) Formation of a molecule of glucose would require nine "turns." B) G3P more readily forms sucrose and other disaccharides than it does monosaccharides. C) Some plants would not taste sweet to us. D) The formation of sucrose and starch in plants involves assembling G3P molecules, with or without further rearrangements. E) Plants accumulate and store G3P.
The outcome of the conflict between bacteria and bacteriophage at any point in time results from
A) frequency-dependent selection. B) evolutionary imbalance. C) heterozygote advantage. D) neutral variation. E) genetic variation being preserved by diploidy.