Vertabrates

The evolution of the first vertebrates occurred in which of the following places?

The ocean

Which of the following is true of both of the nonvertebrate chordates Urochordata and Cephalochordata?

They have a notochord.

mammals

They have mammary glands. They have hair. They have a placenta. They are endothermic.

Which of the following features is not one of the key characteristics that are shared by most amphibians?

an amniotic egg

Two groups of vertebrates are endothermic

birds and mammals

Lancelets can be accurately described as which of the following?

chordates

Animals that are able to generate their body heat internally are best described as which of the following?

endothermic

It is thought that the first vertebrates evolved ____.

in the ocean during the Cambrian period

Which of the following accurately describes a form of reproduction in which the male places sperm inside the female before the egg has developed its outer protective membranes?

internal fertilization

Which of the following is not one of the five key features of fish?

internal organs

the ____are the only mammals that lay eggs rather than bear live young

monotremes

The three main groups of mammals

monotremes, marsupials, placentals

Select the features that are shared by all vertebrate chordates but are not found in nonvertebrate chordates.

neural crest, vertebral column, endoskeleton, well developed internal organs, head

Which of the following is not a characteristic of vertebrates that distinguishes them from nonvertebrate chordates?

notochord

in ____ mammals the fetus' and the mother's blood streams are brought in close contact via a ___

placental, placenta

____ have chordate larval forms, which metamorphose into sessile, filter-feeding adults that bear primitive resemblance to other chordates.

tunicates

Fill in the blank question. Despite how different their sessile, filter-feeding adult forms seem, larval ____clearly display chordate features.

tunicates or unochordates

Nonvertebrate chordates do not form _____ or other bones.

vertebrae

fivefeatures of fish

vertebral columns jaws and paired appendages internal gills single-loop blood circulation nutritional deficiencies

The skeleton of Chondrichthyans is made of which of the following?

Cartilage

Lancelets belong to the phylum

Chordata

Which of the following are reptile adaptations that improved on the amphibian adaptations to land-life?

Efficient heart and lungs for oxygen delivery to muscles Skin covered in plates or scales Eggs protected by watertight coverings

Which of the following accurately describe the placenta of placental mammals?

It nourishes the fetus throughout its entire development. It brings the mother's and fetus' blood supply in close contact.

Which of the following are features of bony fishes?

- most have scale-covered skin - all have a bony skeleton

The primary characteristics that differentiate birds from reptiles are which of the following?

thin hollow bones & feathers

Which of the following features are shared between small theropod dinosaurs and Archaeopteryx?

toothed bill & long tail with many vertebrae