Ch 19: Section 2

Ch 19: Section 2

Advent of Multicellularity

Objectives

• Contrast the terms colony and aggregate

• List the characteristics of protist

• List the characteristics of fungi

Volvox is a colonial organism. Each is a hollow ball of hundreds or thousands of flagellated cells embedded in a jellylike layer. A plasmodial slime mold is an aggregate organism. Its cells form a large mass temporarily.

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A

organism is a group of cells that are permanently associated but that do not communicate with one another.

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An

is a temporary collection of cells that come together for a period of time and then separate.

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A

organism is an organism composed of many cells that are permanetly associated with one another.

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is the process by which cells develop a specialized form and function.

Open Ended

Order these terms from smallest to biggest:

Organ system

Tissue

Organ

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The slender strands of fungi are called

.

Open Ended

Differentiate a colony from an aggregation.

Open Ended

Describe the characteristics of the protists

Open Ended

Describe the characteristics of the fungi

Open Ended

Evaluate the argument that insects and fungi are closely related because both have chitin covering their bodies