Thermodynamics tells us that efficiency in reactions is important and determined by how much energy is lost to heat in a reaction. In the metabolism of glucose, what percentage of the energy is extracted?
a. 50 percent
b. 100 percent
c. 34 percent
d. less than 10 percent
c. 34 percent
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The Dunkers are a religious group that moved from Germany to Pennsylvania in the mid-1700s. They do not marry with members outside their own immediate community. Today, the Dunkers are genetically unique and differ in gene frequencies, at many loci, from
all other populations including those in their original homeland. Which of the following likely explains the genetic uniqueness of this population? A) population bottleneck and Hardy-Weinberg equilibrium B) heterozygote advantage and stabilizing selection C) sexual selection and inbreeding depression D) mutation and natural selection E) founder effect and genetic drift
The genomes of most plant viruses consist of single stranded DNA
____________________ Indicate whether the statement is true or false.
Which of the following forms of homeostasis would not be affected by a severe burn involving both the epidermis and dermis?
A) control of water loss by the integumentary system B) protection from microbes by the integumentary system C) defense against microbes by the immune system D) sensation of external temperature
The hypothesis that life began with the evolution of inorganic compounds into simple organic molecules, macromolecules, and protocells is called what?
A. chemical evolution B. organic chemistry C. speciation D. Darwinian evolution E. cell theory