Which of the following is a correct sequence of levels in...

Name: Problem 2, Chapter 1: Campbell Biology
Uploaded: 2020-10-07T01:35:53-08:00
Duration: 1 min 54 s
Channel: Sam James
Description: Which of the following is a correct sequence of levels in life's hierarchy, proceeding downward from an individual animal? a. organism, brain, organ system, nerve cell b. organ system, nervous tissue, brain, nerve cell c. organism, organ system, tissue, cell, organ d. nervous system, brain, nervous tissue, nerve cell

Which of the following is a correct sequence of levels in life's hierarchy, proceeding downward from an individual animal? a. organism, brain, organ system, nerve cell b. organ system, nervous tissue, brain, nerve cell c. organism, organ system, tissue, cell, organ d. nervous system, brain, nervous tissue, nerve cell

Which of the following is a correct sequence of levels in life's hierarchy, proceeding downward from an individual animal?
a. organism, brain, organ system, nerve cell
b. organ system, nervous tissue, brain, nerve cell
c. organism, organ system, tissue, cell, organ
d. nervous system, brain, nervous tissue, nerve cell

Key Concepts

Tissues and Cells

Cells are the basic units of life, and when similar cells group together to perform specific functions, they form tissues. This concept is essential as it demonstrates the progression from a single cell to organized tissues, which further contribute to the formation of organs and more complex systems within multicellular organisms.

Organ Systems

An organ system is a group of organs that work together to perform complex functions. Recognizing how organ systems operate emphasizes the idea that multiple organs interact cooperatively, each contributing to the overall performance of bodily functions, thereby illustrating a key level in the biological hierarchy.

Levels of Organization

Levels of organization in multicellular organisms include cells, tissues, organs, and organ systems, culminating in the individual organism. Each level represents a step in the integration of biological structures, where simple components form more complex assemblies that carry out specific functions necessary for life.

Biological Hierarchy

This concept refers to the systematic arrangement of biological structures in order of increasing complexity. It spans from the smallest units like molecules and cells to tissues, organs, organ systems, and finally, the entire organism. Understanding this hierarchy helps explain how life is organized structurally and functionally.

Transcript

00:02 Okay, so the question is asking us, which of the following is a correct sequence of levels in life's hierarchy, proceeding downward from an individual animal? a, organism, brain, organ system, nerve cell.

00:13 B, organ system, nervous tissue, brain, nerve cell.

00:17 C, organism, organ system, tissue, cell organ.

00:21 Or d, nervous system, brain, nervous tissue, nerve cell.

00:25 Okay, so the goal here is to get smaller each time more individual.

00:29 So a starts out well with organism.

00:33 That's as big as we can get when we're talking about an animal.

00:36 But then it goes immediately to brain and then organ system.

00:39 And that's incorrect.

00:40 It should be the other way around.

00:41 Organ system consists of many organs, whereas the brain is just one.

00:45 So this is incorrect.

00:46 We're going to x that out.