True or false? Without oxygen the cells can’t produce any energy at all
True
False
B. False
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You want to test whether reciprocity explains the evolution of mobbing behavior in birds
You have two sources of birds to choose from: (A) a group of birds from your lab that all originated from the same mating pair, and (B) a group of presumably unrelated birds from the wild. Briefly justify your answer. What will be an ideal response?
During prophase II, ____
a. a new spindle forms b. crossing over occurs c. chromosomes are single-stranded d. the cell is diploid e. the nuclear envelope re-forms
Genes that encode proteins that are always needed are called:a
repressible genes. b. promoter genes. c. constitutive genes. d. inducible genes. e. operons
Which is not true of the cytoplasmic membrane?
A. It defines the boundaries of the cell. B. It is a semipermeable barrier. C. It consists mainly of a fixed, static, phospholipid bilayer. D. It uses proteins as selective gates and sensors. E. All of the choices are true.