Which of the following pairs indicates the closest
macroevolutionary link among the animals according
to the evolutionary history tree in the text?
a. flatworms; roundworms
b. sponges; cnidarians
c. arthropods; annelids
d. arthropods; roundworms
e. echinoderms; mollusks
Answer: d
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Frogs and toads belong to which of the following lineages?
a. Caudata b. Aves c. Squamata d. Gymnophiona e. Anura
Which statement is NOT true about Monteverde
Cloud Forest Reserve? a. More than 50,000 tourists visit the reserve each year b. It is one of the few habitats left for jaguar, puma and ocelot c. It is home to more than 400 species of birds. d. Deforestation is no longer a problem outside the reserve’s borders. e. Ecotourism on the reserve provides employment to local people.
What term describes the implantation of the blastocyst in a place other than the uterus?
a. menstruation b. gastrulation c. ectopic pregnancy d. endometrial pregnancy e. conjoined pregnancy
In a hypothetical environment, fishes called pike-cichlids are visual predators of large, adult algae-eating fish (in other words, they locate their prey by sight). The population of algae-eaters experiences predatory pressure from pike-cichlids
Which of the following is least likely to result in the algae-eater population in future generations? A) selection for drab coloration of the algae-eaters B) selection for nocturnal algae-eaters (active only at night) C) selection for larger female algae-eaters, bearing broods composed of more, and larger, young D) selection for algae-eaters that become sexually mature at smaller overall body sizes