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