While Most Bacteria Are Eliminated by Antibiotics, Some Can Possess

question 55

Multiple Choice

While most bacteria are eliminated by antibiotics, some can possess mutations that are resistant to antibiotics, leading to more drug-resistant strains of bacteria. Such a mutation is an example of which of Charles Darwin's proposed criteria for traits to evolve through natural selection?

• A) The trait must be inheritable.
• B) The trait must be able to be learned.
• C) The trait must vary.
• D) The trait must make the individual more fit to survive.

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Definitions:

Diploid Parent Cell

A cell that contains two complete sets of chromosomes, one from each parent, and is the precursor to gametes in sexual reproduction.

Double Division

A term often related to meiosis, the process by which cells divide to produce gametes (sex cells) involving two rounds of nuclear division resulting in four genetically distinct cells.

Trophoblast

A layer of cells forming the outer shell of a blastocyst, providing nutrients to the embryo and developing into a large part of the placenta.

Extraembryonic Membranes

Membranes that develop outside of the embryo in amniotes, providing protection, nutrition, gas exchange, and waste elimination.