Penicillin halts bacterial infections by
A. stimulating a person's immune system.
B. damaging the cell membrane.
C. interfering with the construction of the cell wall.
D. causing the DNA of a bacterium to mutate.
E. All of the answer choices are correct.
C. interfering with the construction of the cell wall.
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The different versions of genes that code for hair color and length are examples of
__________.
a. alleles b. meiosis c. chromosomes d. gene flow
How are the feeding habits of lampreys best described?
a. suspension feeding b. predatory c. parasitic d. scavenging e. passive
Select all the following descriptions that apply to the location of the thymus.
A) behind the sternum B) in the same cavity as the lungs C) superior to the heart D) in the neck
Complete androgen insensitivity causes XY males to become phenotypic females
a. True b. False