Introduction to Animal Biology
An introductory worksheet covering basic concepts in animal biology, including cell structure, classification, and organ systems for Grade 8 science students.
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Introduction to Animal Biology
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Read each question carefully and answer to the best of your ability. For multiple-choice questions, circle the correct option. For fill-in-the-blank and short answer questions, write your answer in the space provided.
1. Which of the following is NOT a characteristic of all living organisms?
Growth and development
Ability to reproduce
Photosynthesis
Response to stimuli
2. Which organelle is responsible for generating most of the energy in an animal cell?
Nucleus
Mitochondria
Cell wall
Chloroplast
3. The scientific classification system arranges organisms into a hierarchy, starting with the broadest category called and ending with the most specific category, .
4. Animals that maintain a constant internal body temperature regardless of the external environment are called , while those whose body temperature fluctuates with the environment are called .
5. Briefly explain the difference between a vertebrate and an invertebrate. Provide one example of each.
Match the organelle with its primary function.
6. Nucleus
a. Controls what enters and leaves the cell
7. Cell Membrane
b. Produces proteins
8. Ribosome
c. Contains the cell's genetic material
9. Label the following parts of the animal cell:
A:
B:
C:
D: