Two kinds of birds eat the same food and nest in the same area. These two species of birds are in
a) competition
b) equilibrium
c) parasitism
d) mutualism
Ans: a) competition
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Organisms such as Streptococcus pyogenes and Staphylococcus aureus that produce leukocidins are called ________ pathogens
A) pyogenic B) radical C) enterotoxigenic D) hemorrhagic
Where are blood cells and platelets produced?
A. in red marrow inside of bones B. in yellow marrow inside of bones C. in joints by chondrocytes D. in the liver E. in the spleen
In her biology class, Natasha has been asked to complete a strand of DNA with the appropriate nucleotides. If half of the strand is A-T-C-C-G-A-T-C, what would she write for the other half?
A) T-A-G-C-C-T-A-C B) T-U-G-G-C-T-U-G C) T-U-G-C-G-U-A-G D) T-A-G-G-C-T-A-G
Which of the following is not one of the signs assessed using Amsel's criteria to diagnose bacterial vaginosis?
A) greyish-white vaginal discharge B) presence of any type of redness or rash C) vaginal pH greater than 4.5 D) clue cells attached to vaginal epithelial visible upon microscopic examination E) fishy odor after addition of potassium hydroxide to a vaginal smear