Cryptic species:
a) must obtain their nutrients from parasitizing other species.
b) eat plant material.
c) blend into their surroundings.
d) play dead when threatened.
e) have a distinctive appearance, odor, or behavior that indicates that they are unpalatable.
Ans: c) blend into their surroundings.
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Male crickets create sounds that we call "chirps" by rubbing one wing against the other. Female parasitic flies are attracted to the chirps and lay their eggs on the male once they locate him. Is this an example of communication?
A. Yes, because one individual produced information. B. No, because multiple individuals received information. C. Yes, because information from the sender altered the receiver's behavior. D. No, because the exchange of information resulted in a cost to the sender. E. Yes, because the exchange of information resulted in a benefit to the receiver.
During an infection, lymph nodes swell because ________ cells accumulate inside them
a. natural killer (NK) cells b. B c. T d. mast
Which is true of free radicals?
What will be an ideal response?
The function of lymph nodes is to filter pathogens, microorganisms, and abnormal cells from the lymph before it returns to the cardiovascular system.
a. true b. false