A species that is naturally found only in a particular location is called
A. extinct.
B. endemic.
C. extinct due to the action of humans.
D. exotic.
E. transitional.
B. endemic.
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Similar body parts are not always homologous
They may have evolved independently in separate lineages as adaptations to the same a. reproductive isolation of these groups. b. environmental pressures. c. reduced genetic variability in these groups. d. identical genes in all three groups. e. factor as all of these
Luz, a woman with a history of asthma, walked by a house and noticed that smoke was pouring out of the basement. Evidently, any smoke detector was either absent or not working because nobody in the home was reacting to the emergency
Luz banged on the front door and threw it open, screaming that there was a fire. The family immediately rushed out, but upon reaching the safety of the front lawn, one of the children said the cat was trapped inside. Luz dashed into the now smoke-filled structure, searched around, found the cat, and emerged with the frightened but safe creature. According to the chapter, what short- and long-term problems will Luz most likely have?
Ecdysozoans
A) have a special feeding structure. B) periodically shed their outer body covering. C) have trochophore larva. D) include mollusks, annelids, and flatworms. E) have a body cavity that forms from the digestive system.
The first organisms on Earth were very small, but now when you look around you see many large organisms. Which is the best explanation for this observation?
A) Evolution tends toward larger and larger organisms. B) There were many steps necessary to go from small cells to large organisms. C) Organisms got larger because they needed to use resources more efficiently. D) The goal of evolution is to produce the largest organisms possible.