In the mid-nineteenth century Charles Darwin and Alfred Russel Wallace observed many organisms
Based on these observations they arrived to an explanation on how populations change through time.
They termed it:
a. evolution.
b. natural selection.
c. creationism.
d. natural evolution.
e. genetics.
B
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Which of the following is NOT a source of
heritable variation in traits among individuals of a population?
a. mutation b. crossing over c. independent assortment d. fertilization e. mitosis
Karyotyping is useful for determining:a
the number of chromosomes in an individual. b. the presence of recessive traits. c. whether or not a specific gene is missing from a chromosome. d. whether or not gene mutations have occurred. e. the presence of sickle cell anemia.
Which component of the human eye forms the iris?
A) sclera B) choroid C) retina D) pupil
When using a repeating trinucleotide sequence (such as 5?-AAC-3?) in a cell-free translation system, you will obtain:
(a) three different types of peptides, each made up of a single amino acid (b) peptides made up of three different amino acids in random order (c) peptides made up of three different amino acids, each alternating with each other in a repetitive fashion (d) polyasparagine, as the codon for asparagine is AAC