Levels of Organization: Cells to Organ Systems — Drills · Grade 7 Science
Chapter: Body Organization, Transport & MovementWhat these drills covers
By the end of Levels of Organization: Cells to Organ Systems you should be able to:
- I can explain levels of organization: cells to organ systems.
- I can use evidence, a model, and stated assumptions to support a biological explanation.
4 questions, multiple choice and written answer, each with a worked explanation.
Vocabulary used: tissue, organ, organ system, specialization, system boundary.
Problem 1
Which order moves from a smaller organizational level to a larger one?
- Organ→cell→tissue
- Cell→tissue→organ
- System→cell→organ
- Tissue→organism→cell
Answer and explanation
Cell→tissue→organ
Cells contribute to tissues, and multiple tissue types contribute to organs.
Problem 2
Why should a transport diagram include both delivery and exchange?
Answer and explanation
Materials must move to tissues and cross appropriate surfaces. Naming a pump without routes and exchanges leaves the mechanism incomplete.
Problem 3
Why is the heart an organ rather than only one tissue?
Answer and explanation
It combines several tissue types that contribute different roles to pumping and maintaining its structure.
Problem 4
Why can cells with similar genetic information have different roles?
Answer and explanation
They use that information differently and develop specialized structures and activities suited to different functions.