Biology: Life on Earth
Biology: Life on Earth
10th Edition
ISBN: 9780321729712
Author: Gerald Audesirk, Teresa Audesirk, Bruce E. Byers
Publisher: Benjamin Cummings
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Chapter 20, Problem 1FTB

Fill-in-the-Blank

Many predatory protists engulf prey with finger-ashaped extensions called__________. Protists that absorb nutrients from their surroundings may act as _________ of dead organic matter or as harmful ___________ of larger living organisms. LO1

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Summary Introduction

To review:

The given blank space in the statement, “Many predatory protists engulf prey with finger-like extensions called __________. Protists that absorb nutrients from their surroundings may act as __________ of dead organic matter or as harmful __________ of larger living organisms.”

Introduction:

Protist refers to any eukaryote that is not an animal, a fungus, or a plant. Protists are categorized in a kingdom Protista that contains unicellular or unicellular-colonial organisms forming no tissues. Protists manifest diverse modes of locomotion, reproduction, and nutrition.

Explanation of Solution

Protists represent three modes of nutrition: ingestion of food, absorption of nutrients from their surroundings, or trapping solar energy through the process of photosynthesis directly. Protists are usually called predators that ingest food. For doing so, protists use finger-like extensions termed as pseudopods for engulfing prey. Tiny currents created by other predators sweep food particles inside the cell through mouth-like openings. The food is then digested by a food vacuole in both ways of ingesting food.

Nutrients are absorbed by protists from their surroundings directly. These protists may live freely or use bodies of other organisms to live in. protists that live freely are usually found in soil and other environments containing dead organic matter. They act as decomposers. Protists that live inside other or host organisms are parasites and cause harm to the host species.

Conclusion

Many predatory protists engulf prey with finger-like extensions called pseudopods. Protists that absorb nutrients from their surroundings may act as decomposers of dead organic matter or as harmful parasites of larger living organisms.

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