1. The Subphylum Vertebrata differs from the Subphylum Cephalochordata in two di
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Question
1. The Subphylum Vertebrata differs from the Subphylum Cephalochordata in two distinct respects. Select the correct two choices from the following list.
a. Vertebrates have gill slits; cephalochordates do not.
b. Vertebrates have a notochord; cephalochordates do not.
c. Vertebrate notochords are replaced with vertebrae; cephalochordate notochords are not replaced.
d. Vertebrates have a brain; cephalochordates do not.
2. Which of the following are characteristic of all mammals and not of any other living vertebrates?
a. hair
b. milk producing galnds
c. a and b
d. endothermy
3. Monotremes differ from the other mammals in their
a. laying of shelled eggs
b. milk - producing glands
c, fur
d. webbed feet
Explanation / Answer
The Subphylum Vertebrata differs from the Subphylum Cephalochordata in two distinct respects i.e. In the VERTEBRATES the notochord is replaced with the vertebral column and in the Cephalochordates on the other hand the notochord is present as such.
Hence option C is correct.
The characteristic feature of the Mammals is the presence of Hair to protect the body from the effect of trmperature and other factors. And the presence of Mammary glands to feed their young ones.
Hence option C is correct.
Monotremes differ from other mammals because they lay the shelled eggs as compared to the othet mammals which give rise to the young ones directly.
Hence option A is correct.
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