Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332



Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332
Textbook Problem

A bird's keratin-lined _______ helps it grind up food.

  1. a. pharynx
  2. b. crop
  3. c. gizzard
  4. d. gastrovascular cavity

Summary Introduction

Introduction: The gizzard are the modified structure found at the hind part of the stomach that helps for grinding the food. This structure is found in birds and some animals. This organ is made up of thick muscular walls and contains stones that are previously swallowed and help in mechanical breakdown of food. The gizzards are keratin-lined to protect the muscles from the mechanical damage.


Reason for the correct answer: The bird’s digestion takes place in two compartments. First the food enters in the glandular or true stomach known as proventriculus (secretory part) and then moves to the muscular stomach called the gizzard. The gizzard contains thick muscular walls with previously swallowed stones that help in grinding the food and then pass back to the proventriculus and vice versa.

Option c. is given as “gizzard”. The gizzard is the organ found in the birds and animals that helps in grinding and digesting foods.

Hence, the correct answer is option c.

Reasons for the incorrect answers:

Option a...

Still sussing out bartleby?

Check out a sample textbook solution.

See a sample solution

The Solution to Your Study Problems

Bartleby provides explanations to thousands of textbook problems written by our experts, many with advanced degrees!

Get Started

Additional Science Solutions

Find more solutions based on key concepts

Show solutions add

One way to evaluate any diet is to compare the total food amounts that it provides with those recommended by th...

Nutrition: Concepts and Controversies - Standalone book (MindTap Course List)

What are the chemical differences between DNA and RNA?

Biology: The Dynamic Science (MindTap Course List)

In what way has biotechnology had an impact on agriculture in the United States?

Human Heredity: Principles and Issues (MindTap Course List)

2. In healthy men, the hematocrit is about

Cardiopulmonary Anatomy & Physiology

Problem 8-6 The [OH-] of an aqueous solution is M. What is its [H3O+]?

Introduction to General, Organic and Biochemistry

What purpose do the colors in a representational-color image or map serve?

Horizons: Exploring the Universe (MindTap Course List)

A pyramid has a bright of 481 ft, and its base covers an area of 13.0 acres (Fig. P1.20). The volume of a pyram...

Physics for Scientists and Engineers, Technology Update (No access codes included)