Leks are places where male:
a. hanging flies offer female flies meals of dead insects
b. fiddler crabs wave their oversized claws to attract female crabs
c. bison lock horns and wrestle for dominance
d. midwife toads care for strings of eggs
e. sage grouse display to attract females
e
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The class of organic molecules defined by a physical property rather than a structure are the:
A. lipids B. carbohydrates C. proteins D. DNA E. RNA
Which of the following statements about homeotic genes is true? a. All homeotic genes encode enzymes for metabolic pathways that produce pigments affecting eye and body color
b. All homeotic genes encode transcription factors with a homeodomain that can bind to a promoter. c. Homeotic genes encode enzymes that allow Drosophila to break down and digest fructose. d. Homeotic genes are believed to have evolved recently as they are not interchangeable between most species.
Which enzyme did I use if I cut a DNA fragment and ended up with a double stranded sequence that
looks like this:AATTC---------GG---------CTTAA
a. Eco RI b. Hind III c. Bam HI d. Cla I e. Pvu I
The stage of viral replication in which the virus binds a cell surface receptor is
A. release. B. attachment. C. assembly. D. penetration. E. synthesis.