Recent Lessons

Show all results for ""

Feature Overview

Ace your exams with our all-in-one platform for creating and sharing quizzes and tests.

Quizzes

Create quizzes and tests automatically from your content using AI.

Flashcards

Automatically turn your notes into digital flashcards.

Share, Export & Embed

Share with classmates or export to Excel and your learning management system.

Stats & Reporting

Auto-grading quizzes and tests with detailed stats and reports.

Mobile Apps

The smarter way to study – wherever you are.

Pricing

Search...

10 Questions

0 Views

Origin of Jaws in Fishes

Choose a study mode

Play Quiz

Study Flashcards

Spaced Repetition

Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the characteristic of the mouth in agnathans?

It has a floor supported by the hyoid arch

It is neither defined nor supported by jaws (correct)

It has a roof supported by the splanchnocranium and lateral pharyngeal slits

It is defined and supported by jaws

What is the pattern of nerve and blood vessel distribution in jaws and branchial arches?

They are only present in jaws and not in branchial arches

They are distributed in a different pattern in jaws and branchial arches

They are distributed in a similar pattern in jaws and branchial arches (correct)

They are distributed in a random pattern

What is the origin of the musculature of the jaws according to the text?

It is transformed and modified from branchial arch musculature (correct)

It arises from the splanchnocranium

It develops from the neural crest

It is derived from the hyoid arch

What is the embryological evidence that supports the origin of jaws from gill arches?

The development of the jaws and branchial arches occur in series from neural crest Signup and view all the answers

What is the main point of contention in the serial theory and the composite theory?

The number of branchial arches that gave rise to the mandibular arch Signup and view all the answers

What is the conclusion regarding the origin of jaws from the evidence provided?

Jaws are derived from branchial arches Signup and view all the answers

Who proposed the composite theory of the origin of jaws?

Erik Jarvik Signup and view all the answers

What is the main difference between the serial theory and the composite theory?

The serial theory proposes a single branchial arch gave rise to the mandibular arch, while the composite theory proposes multiple branchial arches Signup and view all the answers

What is the evidence from fossil fish skulls that supports the origin of jaws?

The structure of the fossil fish skulls Signup and view all the answers

What is the main idea behind the origin of jaws from branchial arches?

Jaws evolved from a modification of the branchial arches Signup and view all the answers