Chapter 2.2, Problem 4MI

Summary Introduction

To determine:

Whether the given organisms are autotrophs or heterotrophs by writing A for autotrophs and H for heterotrophs.

Introduction:

Based onthe mode of nutrition, living organisms can be divided into two broad groups, autotrophs and heterotrophs. Autotrophs are the organisms, which are capable of synthesizing their own food and the heterotrophs are the organisms that depend on autotrophs as their source of food.

Explanation of Solution

1. Alligator (H) − It is a heterotroph. This is because an alligator is a carnivore that depends on herbivores and herbivores depend on plants for their food.

2. Squirrel (H) − It is a heterotroph. This is because a squirrel is basically dependent on nuts for its food. They cannot make their own food.

3. Maple tree (A) − Maple tree is an autotroph. This is because a maple tree has green leaves that capture sunlight and convert light energy into chemical energy. Hence, a maple tree can make its own food.

4. Whale (H) - It is a heterotroph. This is because a whale is dependent on other animals for its food. They cannot make their own food.

5. Moss (A) - Moss is an autotroph. This is because moss has green leaves that capture sunlight and convert light energy into chemical energy. Hence, moss can make its own food.

6. Siberian tiger (H) - It is a heterotroph. This is because a Siberian tiger is dependent on other animals for its food. They cannot make their own food. They are carnivorous in nature.

7. Daffodil (A) - Daffodil is an autotroph. This is because daffodil, a flowering plant, has green leaves that capture sunlight and convert light energy into chemical energy. Hence, daffodil can make its own food.

8. Rhinoceros (H) −Rhinoceros is a heterotroph. This is because they are dependent mainly on green plants for their survival.

9. Dandelion (A) - Dandelion is an autotroph. This is because it has green leaves that capture sunlight and convert light energy into chemical energy. Hence, a Dandelion can make its own food.

10. Rabbit (H) - Rabbit is a heterotroph. This is because they are dependent mainly on green plants for their survival.

11. Tomato (A) - Tomato is an autotroph. This is because tomato, a fruit-bearing plant, has green leaves that capture sunlight and convert light energy into chemical energy. Hence, tomatoes can make their own food.

12. Cockroach (H) - Cockroach is a heterotroph. This is because they are dependent mainly on dead organisms for their food.