Whales use sound to
a. communicate.
b. locate food.
c. map out their surroundings.
d. communicate and map out their
surroundings.
e. do all of these.
E
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Macrophages and dendritic cells are
A. T cells. B. B cells. C. antigen-presenting cells. D. antibody-producing cells.
The ____ is a hormone produced by specialized cells in the heart in response to high blood pressure
a. atrial natriuretic factor b. renin c. aldosterone d. antidiuretic hormone e. angiotensin
In the following scenario, where could laboratory transmission occur? : A microbiology student was performing a lab exercise. While performing this exercise the student was wearing a lab coat, eye goggles, and gloves. As the exercise was progressing the student diligently recorded the data with a pen, still wearing gloves. At the end of the lab, the student removed her lab coat, goggles and gloves. She proceeded to wash her hands and place her pen into her backpack.
A) students clothes under the lab coat B) lack of handwashing C) students pen D) students backpack
An aquatic microbe that can grow only near the surface of the water is probably which of the following?
A. a phototroph B. a heterotroph C. a chemotroph D. a lithotroph E. an anaerobe