Kingdom Protista SAQs

Questions and Answers

What distinguishes eukaryotic organisms from prokaryotic organisms?

Eukaryotic organisms can create their own food while prokaryotic cannot

Eukaryotic organisms reproduce exclusively by binary fission

Eukaryotic organisms lack a nucleus and enclosed organelles

Eukaryotic organisms have a nucleus and cell-enclosed organelles (correct)

Why is osmoregulation crucial for amoebas living in freshwater environments?

It is responsible for movement through pseudopodia

It allows amoebas to absorb nutrients from the water

It enables amoebas to eliminate waste products efficiently

It prevents excess water from causing cell rupture. (correct)

What is the primary role of the food vacuole in amoeba?

To store energy in the form of starch

To control the cell's water levels

To digest prey after ingesting it (correct)

To absorb oxygen from the surrounding environment

Which characteristic is true of heterotrophic organisms?

They rely on consuming other organisms for nutrition Signup and view all the answers

How does amoeba primarily reproduce?

By binary fission, splitting into two identical cells Signup and view all the answers

What is the function of pseudopodia in amoebas?

For locomotion and capturing prey Signup and view all the answers

When is the contractile vacuole most active in an amoeba?

In freshwater to expel excess water Signup and view all the answers

What describes phagocytosis in amoebas?

It involves engulfing prey and digesting it within a food vacuole Signup and view all the answers

What defines autotrophic organisms?

Organisms that can synthesize their own food Signup and view all the answers

Study Notes

Eukaryotic and Prokaryotic Organisms

Eukaryotic organisms possess a nucleus and cell-bound organelles, distinguishing them from other life forms.
Prokaryotic organisms lack a nucleus and membrane-bound organelles, typically being single-celled.

Autotrophic and Heterotrophic Organisms

Heterotrophic organisms cannot synthesize their own food; instead, they obtain nutrients by consuming other organisms.
Autotrophic organisms can produce their own food through processes like photosynthesis.

Reproduction and Movement in Amoeba

Amoeba reproduce asexually through binary fission, where the cell divides into two identical daughter cells.
Pseudopodia enable amoebas to move and capture prey, facilitating locomotion and feeding.

Functions of Vacuoles in Amoeba

The contractile vacuole regulates osmoregulation, maintaining appropriate water balance within the cell.
Osmoregulation is the process of controlling cytoplasm or blood concentration, crucial for cellular function.
The food vacuole secretes acids and digestive enzymes onto prey, killing it and breaking it down for absorption.

Osmoregulation in Different Environments

The contractile vacuole is more active in freshwater environments due to higher internal cytoplasm concentration compared to the surrounding water.
In saltwater, the cytoplasm's concentration is balanced with its environment, reducing the risk of cellular bursting.

Phagocytosis Process

Phagocytosis involves the food vacuole releasing acids to dispatch prey, followed by enzyme secretion for digestion, and absorption of nutrients into the cytoplasm.

Diseases Associated with Amoeba

Amoeba can cause diseases such as malaria and sleeping sickness, indicating their impact on human health.

Description

Test your knowledge about Kingdom Protista with these Short Answer Questions. This quiz covers aspects of eukaryotic and prokaryotic organisms, as well as heterotrophic and autotrophic characteristics. Challenge yourself and deepen your understanding of these crucial biological concepts.