Protozoans

Q.

What are the characteristics of protozoa?

Q. Define ectoparasite and endoparasite and give suitable examples.

Q.

Read the following five statements (1 - 5) and answer as asked next to them.

(1) In Equisteum the female gametophyte is retained on the parent sporophyte.

(2) In Ginkgo male gametophyte is not independent.

(3) The sporophyte in Riccia is more developed than that in Polytrichum.

(4) Sexual reproduction in Volvox is isogamous.

(5) The spores of slime moulds lack cell walls.

How many of the above statements are correct?

1. Two

2. Three

3. Four

4. One

Q.

What are some examples of non-pathogenic bacteria? How do they live in organisms?

Q.

Ciliates differ from all other protozoans?

1. Using pseudopodia for capturing prey

2. Having two types of nuclei

3. Using flagella for locomotion

4. Having contractile vacuoles for removing excess water

Q.

How are microorganisms classified based on temperature?

Q.

Describe briefly the four major groups of Protozoa.

Q.

Which one of the following shows isogamy with non-flagellated gametes?

1. Ectocarpus

2. Ulothrix

3. Sargassum

4. Spirogyra

Q.

Describe briefly the four major groups of Protozoa.

Q.

What is the smallest bacteria present in the world?

Q.

Which protozoan is a connecting link between plants and animals?

1. Entamoeba

2. Paramoecium

3. Euglena

4. Monocystis

Q.

Four whorls of a flower are located on the.

1. Flower Axis

2. Pedicel

3. Thalamus

4. None

Q. Marine protozoans do not have contractile vacuole because

1. their body cannot accommodate it
2. they are hypo-osmotic to their environment
3. they are isotonic to their environment
4. osmoregulation is done by the cell membrane

Q.

What is the difference between anisogamy and oogamy?

Q.

How are protists helpful to humans?

Q.

Give two examples of flagellated Protozoans.

Q.

What is the encystation in Amoeba?

Q.

Common feature of Gonyaulax, Euglena, Amoeba and Pinnularia is that

1. they show holozoic nutrition

2. they show autotrophic nutrition

3. they are unicellular and prokaryotic

4. they are unicellular and eukaryotic

Q. Identify the group of protozoan which is not correctly matched with its feature?

1. Flagellated- either free living or parasitic
2. Amoeboid- move and capture their prey with the help of false feet
3. Ciliated- actively moving organisms due to presence of cilia
4. Sporozoans- marine forms have silica shells on their surface

Q.

Why are contractile vacuoles useless in salt water?

Q.

Kingdom Protista includes

1. Dinoflagellate

2. Chrysophyte

3. Euglenoids

4. All of these

Q. Asexual reproduction by zoospores is observed in [1 mark]
(A) Penicillium
(B) Hydra
(C) Sponge
(D) Chlamydomonas

Q.

What observable features in Trypanosoma would make you classify it under kingdom-Protista?

Discuss cell structure of Trypanosoma also discuss its different strain in brief.

Q.

What makes the nucleopolyhedrovirus a desirable biological agent?

Q. Plasmodium belongs to

1. amoeboid protozoans
2. flagellated protozoans
3. sporozoans
4. ciliated protozoans

Q.

Define parasite. Give two examples.

Q. Which one of the following groups of animals reproduce only by sexual means?

1. Ctenophora
2. Cnidaria
3. Porifera
4. Protozoa

Q.

Multicellular heterotrophs are included in the kingdom ____________.

1. Fungi and Animalia

2. Protista and Fungi

3. Protista and Animalia

4. Monera and Protista

Q.

Radula is absent in:

1. Pila

2. Aplysia

3. Pinctada

4. Octopus

Q.

Give an example of a parasitic protozoan.