13.) In the evolution of vertebrates, the gnathostome step: (check all that appl

Question

13.) In the evolution of vertebrates, the gnathostome step: (check all that apply)

a.) involved transition in the feeding method employed so the organism can select food from its environment

b.) elastic fibers replacing collagen fibers provided support for raptorial feeding

c.) complex, folded respiratory membranes for increased respiratory demands due to active lifestyle

d.) ciliary pump supported by pharyngeal pump for a more forceful pull of water

e.) required development of jaw and associated musculature to grasp and hold caught prey

Explanation / Answer

Gnathosomes were the jawed ancestor fish.
These include ray finned fishes, sharks, mammals etc.
Gnathosomes simply mean jawwed vertebrates.
They developed a new style for feeding which enables them to grasp chunks of flesh.
Hence options a and e are correct.

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.