When comparing two solutions, the solution that has a higher solute concentration and a higher osmotic pressure is referred to as a(n) __________ solution.
A) isotonic
B) hypotonic
C) hypertonic
D) crystalloid
Answer: C) hypertonic
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As a malarial infection (Plasmodium falciparum) progresses, gametocytes are formed. The gametocytes unite in the bloodstream before being picked up by the insect vector
Indicate whether the statement is true or false.
A bird cracks open the seed coat with its teeth before swallowing
Indicate whether the statement is true or false.
Researchers trying to cure a deadly virus have discovered that it can only infect cells that display specific carbohydrate chains on their exterior plasma membrane. An early drug trial incorporated an enzyme designed to digest all carbohydrates outside the cell. Researchers believed that without those carbohydrate markers, the virus would not be able to identify vulnerable cells. When tested, the drug caused massive tissue damage instead. What mistake did the researchers make?
a. They forgot that the primary component of plasma membranes is carbohydrates; the drug destroyed the cells’ membranes. b. Without their carbohydrate markers, the cells were identified by antibodies as being foreign and were destroyed. c. Carbohydrates attached to the plasma membrane also bind cells together; without them, the tissues fell apart. d. The enzymes released carbohydrates into the intercellular medium, allowing the virus to replicate faster.
In a mushroom, the primary mycelium is composed of __________ cells
a. monokaryotic b. dikaryotic c. homothallic d. coenocytic e. prokaryotic