As a final exam question in your biology course, you are asked to identify an animal that you immediately recognize as a chordate. Your instructor applauds you for your quick recognition of the phylum, but then he asks you to be more specific. You reply that the animal that you are observing is a craniate. To get an A, you must also tell your instructor how you came up with your answer. What features would you use to formulate your answer? Check all that apply.

a. Most craniates lack a functional jaw.
b. The anterior end of the nerve cord is elaborated to form a brain in craniates.
c. The brain is encased in a protective bony or cartilaginous housing in craniates.
d. Adult craniates lose most of their chordate characteristics.
e. A group of embryonic cells called the neural crest form on either side of the neural tube in craniates.

Question

03-02-2020
Biology

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As a final exam question in your biology course, you are asked to identify an animal that you immediately recognize as a chordate. Your instructor applauds you for your quick recognition of the phylum, but then he asks you to be more specific. You reply that the animal that you are observing is a craniate. To get an A, you must also tell your instructor how you came up with your answer. What features would you use to formulate your answer? Check all that apply.

a. Most craniates lack a functional jaw.
b. The anterior end of the nerve cord is elaborated to form a brain in craniates.
c. The brain is encased in a protective bony or cartilaginous housing in craniates.
d. Adult craniates lose most of their chordate characteristics.
e. A group of embryonic cells called the neural crest form on either side of the neural tube in craniates.

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waidigbenro waidigbenro · Answer 1 · 2020-02-03T22:30:36+01:00

Answer:

b. The anterior end of the nerve cord is elaborated to form a brain in craniates.

c. The brain is encased in a protective bony or cartilaginous housing in craniates.

e. A group of embryonic cells called the neural crest form on either side of the neural tube in craniates.

Explanation:

A craniate is an animal that has a skull, and except for the hagfish they have backbones and examples are humans and animals like the dog, horse gorillas, and cats. The anterior end of their nerve cord is elaborated to form a brain which is encased in a protective bony or cartilaginous housing case. While A group of embryonic cells called the neural crest form on either side of the neural tube.