Which of the following could be classified as a "transitional form" fossil?
A. Hyracotherium, the first fossil of a horse that was found 55 mya.
B. An early amphibian tetrapod from 360 mya.
C. A clam shell laying at the bottom of the ocean.
D. A fossil that has all of the ancestors traits and none of the present day animals traits.
E. A fossil that has some ancestoral traits and some traits that are found in present day animals.
A. Hyracotherium, the first fossil of a horse that was found 55 mya.
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Plasmid DNA having one EcoRI recognition sequence is treated with EcoRI restriction endonuclease. Following gel electrophoresis, how many bands should be visible on the gel?
A. Zero B. Four C. One D. Two
The amount of energy needed by the body to perform essential functions such as breathing is the ________
Fill in the blank(s) with correct word
During an action potential,
a. sodium ions rush out of the cell, switching the potential to +35 mV. b. sodium ions rush into the cell, switching the potential to ?70 mV. c. sodium ions rush into the cell, switching the potential to +35 mV. d. sodium ions rush out of the cell, switching the potential to ?70 mV. e. sodium ions rapidly move in and out of different parts of the neuron, oscillating potential between ?50 and +35 mV.
Which of the following is NOT an organic molecule?
A) Nucleic acid B) Lipid C) Protein D) Carbon monoxide E) Monosaccharide