Exam 34: Deuterostome Animals

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?

What group of mammals have (a)embryos that spend more time feeding through the placenta than the mother's nipples,(b)young that feed on milk,and (c)a prolonged period of maternal care after leaving the placenta?

Mammals and birds eat more often than reptiles.Which of the following traits shared by mammals and birds best explains this habit?

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

As you are walking along a beach,you find an animal and believe that it belongs to the class Asteroidea.Which of the following characteristics would support your hypothesis that the animal is a sea star and not another type of echinoderm?

What is believed to be the most significant result of the evolution of the amniotic egg?

If you found a fossil fish and had dated it to 400 mya,what feature might indicate that it is actually younger than you first thought?

Which of the following groups is classified as Homo sapiens?

_____ led to mammals and birds having similar insulating skin coverings such as fur,hair,and feathers.

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

The structure that develops into the vertebrate spinal cord is the _____.

How does a swim bladder help the ray-finned fishes maintain buoyancy?

-Refer to the paragraph on Brown et al.and Morwood et al.Which of the following observations would not support the hypothesis that H.floresiensis used symbolic spoken language?

If a kelp farmer wanted to maximize her harvest,which type of echinoderm would she be most concerned about in the habitat?

Which of the following characteristics evolved independently in mammals and birds?

The discovery of Caudipteryx is significant in evolutionary biology because it strengthened which one of the following hypotheses?

What do all deuterostomes have in common?

How are hemichordates,urochordates,and cephalochordates similar?

On the back of your skull you can feel a small bump,below which is an opening where the spinal cord enters the skull.The location of this opening toward the bottom of the skull is significant in evolutionary biology for what reason?

Which characteristic is common to all the modern representatives of all major reptilian lineages (Testudinia,Lepidosauria,Crocodilia,or Aves)?