Which of the following is the end goal of a negative feedback system?
A. Hybridization
B. Reproduction
C. pH adjustment
D. Homeostasis
E. Evaporation
Answer: D
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What is a plant’s main line of defense against
viral infection?
a. immune system cells b. viral toxins within the central vacuole c. membrane proteins that latch onto virus particles d. a thick cell wall that prevents viral entry e. a nuclear membrane that is impermeable to viruses
The expression "pull of the recent" refers to the fact that ________
A) younger fossils are more important for the study of evolution than older fossils B) older rocks are more likely to be volcanic rocks with no fossils C) younger rocks are more likely to be covered up or otherwise inaccessible D) the quality of the fossil record gets worse the farther back in time you look E) younger fossils are more likely to be preserved by permineralization
What happens to a dust particle that is too large to stay airborne and land in the alveoli?
A) It lands in the respiratory bronchiole, where it is coughed out. B) It lands in the mucociliary ladder, where it is moved to the trachea to be exhaled. C) It lands in the mucociliary ladder and moves to the pharynx to be swallowed. D) It lands in the bronchi, where it is absorbed. E) It lands in the mucociliary ladder, where type II macrophages phagocytize them.
Afterbirth refers collectively to:
a. the fetus and the placenta. b. the fetus and the surrounding fetal membranes. c. the fetus and the umbilical cord. d. the placenta and the fetal membranes. e. the fetus, the umbilical cord, and the placenta.