Heavy metals are effective antimicrobial agents but are not widely used because of their high toxicity to humans.
Answer the following statement true (T) or false (F)
True
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Drugs are used to treat malaria include
A. qualaquin. B. metronidazole. C. chloroquine. D. chloroquine and qualaquin.
Why would hydrophilic substances such as sodium ions (Na+), hydrogen ions (H+), sugars, and amino acids be unable to simply diffuse across a plasma membrane?
a. They readily mix with the hydrophobic tails forming the core of the phospholipid bilayer. b. They are repelled by the hydrophilic heads of the phospholipids that form the phospholipid bilayer. c. They do not readily mix with the hydrophobic tails forming the core of the phospholipid bilayer; therefore, they must move across by facilitated diffusion. d. They do not readily mix with the hydrophobic tails forming the core of the phospholipid bilayer; therefore, the only way they can move into the cell is by endocytosis.
The organ that is responsible for secreting cocoons in the oligochaetes is known as the
A. radula. B. nephridia. C. clitellum. D. lophophore. E. setae.
You are a naturalist traveling with a group of explorers in a valley of the Amazon rainforest. In a particularly wet area, you see a beautiful carpet of small plants. You notice tiny flowers on most of the plants. To which group do these plants belong?
A) angiosperms B) gymnosperms C) mosses D) hornworts E) seedless vascular plants