16) Lampreys differ from fishes in that lampreys
A. lack a backbone.
B. lack an endoskeleton.
C. lack jaws.
D. possess a backbone and skull.
17. The key derived character of the lobe-finned fish is
A. the lateral line system.
B. the series of rod-shaped bones in their pectoral and pelvic fins.
C. the operculum.
D. the flattened scales covering their skin.
18) The vertebrate group that describes all jawed vertebrates with two pairs of limbs is the
A) craniates.
B) amniotes.
C) tetrapods.
D) mammals.
19) Which of the following adaptations allowed reptiles to complete their life cycles on land?
A) lungs
B) an amniotic egg
C) ectothermic metabolism
D) four legs
20) Mammals
A) evolved from birds.
B) all give birth to live young.
C) all lay eggs.
D) have hair and mammary glands.

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adefioyelaoye adefioyelaoye · Answer 1 · 2022-12-22T14:45:15-05:00

The answers include the following:

Lampreys differ from fishes in that lampreys lack jaws which is denoted as option C.
The key derived character of the lobe-finned fish is the series of rod-shaped bones in their pectoral and pelvic fins which is denoted as option B.
The vertebrate group that describes all jawed vertebrates with two pairs of limbs is the tetrapods and is denoted as option C.
The following adaptations which allows reptiles to complete their life cycles on land is lungs and is denoted as option A.
Mammals have hair and mammary glands and is denoted as option D.

These are animals whose blood temperature changes with the outside temperature and usually lie on their belly.

All of them possess lungs through which gaseous exchange takes place and examples include lizard, alligator, snake etc.

Read more about Mammals here https://brainly.com/question/1309369

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