If you look at unknown cells under a microscope, what could lead you to correctly conclude that they are prokaryotic cells?
A. They form a colony.
B. They are oblong in shape.
C. They appear to have a cell wall.
D. They lack a nucleus.
Answer: D
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In mosses, the zygote grows and develops into a sporophyte while remaining attached to and nourished by its ____
a. sperm-producing sporophyte parent b. sperm-producing gametophyte parent c. egg-producing sporophyte parent d. egg-producing gametophyte parent e. own photosynthetic leaf-like parts
What intestinal processes would be inhibited by a toxin that blocked the basolateral Na+/K+ ATPases on the intestinal epithelium? (Select all that apply.)
a. Movement of fatty acids across the apical membrane b. Transport of glucose into the epithelium across the apical membrane c. Transport of fructose into the epithelium across the apical membrane d. Transport of potassium into the epithelium across the basolateral membrane
Which statement about the application of insecticides is true?
A) To control agricultural pests, pest management uses biological controls, chemicals, or cultural methods, but never a combination of these. B) Simply killing many individuals is often the best way to reduce the size of a pest population. C) Most insecticides kill the pest but not the pest's natural predators. D) Pest species can rebound faster than their predators because the pests often have a higher reproductive rate than predators have.
Some bacteria have an outer layer called a ________ which allows them to adhere to surfaces and contributes to their ability to cause disease
A) cell wall B) LPS C) capsule D) flagellum E) pilus