Exam 32: Deuterostome Animals

In what way are monotremes similar to more ancestral chordate lineages, as opposed to more recently evolved mammals?

Why do adult urochordates tunicates) lack notochords, even though larval urochordates have them?

For which of the following feeding tactics discussed in Chapter 33 do echinoderms use their podia?

Which of the following is consistent with the out- of- Africa hypothesis?

The presence of vestigial hip and leg bones in boas and pythons is considered evidence for what evolutionary link?

It is believed that the coelacanths and lungfish represent a crucial link between other fishes and tetrapods. What is the major feature in these fish in support of this hypothesis?

In an amniotic egg, where is the embryo found?

This group of deuterostomes is characterized by a water vascular system and calcium carbonate endoskeletons.

Suppose you traveled back in time and located the first animals to have developed feathers. You found that these animals were ground- dwelling ectotherms, able to run quickly, but unable to fly or even glide. You also noticed that males of the species had no feathers at all, while females had bright blue feathers covering their tails. Which hypothesis of feather evolution would these data most support?

How did the development of the jaw contribute to evolutionary diversification of early vertebrate lineages?

What is the best evidence currently available that tetrapod limbs evolved from fish fins?

Which of the following do the prosimians and the anthropoids NOT have in common?

Use the following information when answering the corresponding questions). Brown et al. and Morwood et al. reported, in 2004, that they had found skeletal remains of a previously unknown type of hom now dubbed Homo floresiensis, on the Indonesian island of Flores. These hominins were small approximately 1 m tall), with small braincases approximately 380 cm³), as compared with other hominins. The remains of H. floresiensis were found alongside handmade stone tools and the remains of dwarf elephants that also inhabited the island, suggesting that H. floresiensis was able both to make tools and to coordinate the hunting of animals much larger than itself. H. floresiensis is estimated to have lived at the site where the remains were found from at least 38,000 years ago to 18,000 years ago. -Which of the following observations would not support the hypothesis that H. floresiensis used symbolic spoken language?

Which of the following classes is comprised of carnivorous predators that are able to extend their stomachs through their mouths to feed?

The hypothesis that birds evolved from dinosaurs is potentially confusing because dinosaurs-at least the ones thought to be the ancestors of birds-did not fly. Why do biologists still hold to this hypothesis despite this point?

Adult tunicates urochordates) lack notochords. However, larval urochordates have them and use them to

Terry takes the body of a snake- like organism and slices it open along its dorsal side. If it is a hagfish, what should Terry see?

Which of the following is found in tetrapods and not in fish?

Use the following information when answering the corresponding questions). Brown et al. and Morwood et al. reported, in 2004, that they had found skeletal remains of a previously unknown type of hom now dubbed Homo floresiensis, on the Indonesian island of Flores. These hominins were small approximately 1 m tall), with small braincases approximately 380 cm³), as compared with other hominins. The remains of H. floresiensis were found alongside handmade stone tools and the remains of dwarf elephants that also inhabited the island, suggesting that H. floresiensis was able both to make tools and to coordinate the hunting of animals much larger than itself. H. floresiensis is estimated to have lived at the site where the remains were found from at least 38,000 years ago to 18,000 years ago. -Table 32.8 is a comparison of several characteristics of H. floresiensis to those of nine other hominin species arranged roughly from oldest to most recent). What do these data suggest?

Which evolutionary innovation was most significant in helping tetrapods move to dry terrestrial environments?