Cnidarians exhibit bilateral symmetry, an advancement from the phylum Porifera. Indicate whether the statement is true or false
ANS: F
Cnidarians are radial symmetric in their body plan. They can be divided on multiple planes on a
centric axis and still remain symmetrical. They do not have a distinguished head region like a bilateral
organism. Information can be found in the section Invertebrates Are the Most Successful and Abundant
Animals.
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In many countries, total fertility rate is at or below the replacement rate. Do the benefits outweigh the costs when populations remain stable or decline?
a. Yes. Individuals will have more access to limitednatural resources and a higher quality of life. b. No. There will eventually be a lack of suitableresources to care for the aging population. c. No. Fewer individuals in a population means less brainpower to tackle society’s toughest challenges. d. Yes. This trend indicates that women have better access to education and resources for familyplanning.
A large person and a small person wish to parachute at equal terminal velocities. The larger person will have to
A) get a larger parachute. B) jump lightly. C) pull upward on the supporting strands to decrease the downward net force. D) jump first from the plane. E) none of the above
NAFTA (North American Free Trade Agreement) is an agreement that does what?
A) Allows the free migration of people between countries in North America B) Limits tariffs and trade restrictions C) Ensures that all countries have strong environmental and workers rights regulations D) All of the above
The sky is overcast and it is raining. The cloud above you is a cumulus humilis cloud
a. True b. False