Biofilm formation by Pseudomonas bacteria on the surface of a natural loofa sponge kept in the shower is an example of which type of relationship?
A. Predation
B. Parasitism
C. Mutualism
D. Commensalism
Answer: D
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An insect, such as a moth or cricket, detects sound ____
a. though specialized tympanic membranes located near the head b. through a thinned region of the exoskeleton that forms a tympanum c. through general mechanoreceptors on its skin d. by using a specialized organ that measures the frequency of vibration of the surrounding air particles
e. through a series of mechanoreceptors arranged in a lateral lineYou have discovered a new organism that displays bilateral symmetry during its larval stage, radial symmetry as an adult, develops three germ layers during embryonic development, and forms a mouth opposite the blastopore. Which classification for this organism is most likely?
a. Ctenophora b. Placozoa c. Echinodermata d. Cnidaria
After meiosis, the gamete joins with another gamete in all eukaryotic organisms.
Answer the following statement true (T) or false (F)
Which of the following statements about plant toxins against herbivores is false?
A. Even a little bit of the toxin will be deadly. B. The toxin may not be toxic unless it is metabolized in the intestine of a herbivore. C. Some toxins can over stimulate particular physiological processes. D. The toxin may have also have a bad taste. E. The toxin may be kept in a membrane-bound structure to keep it from harming the plant.