Protozoans

Q.

What is protozoa life cycle?

Q. Which among the following is monogenetic?

1. Plasmodium vivax
2. Trypanosoma gambiense
3. Taenia solium
4. Entamoeba histolytica

Q.

Give two sporozoan examples.

Q. Plasmodium belongs to

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

Q. Match Column-l with Column-ll and select the correct option from the codes given below.

$\begin{array}{cc}\text{Column-I}& \text{Column-II}\\ \text{A. Chief producers in oceans}& \text{(i) Euglenoids}\\ \text{B. Red tides}& \text{(ii) Diatoms}\\ \text{C. Mixotrophic nutrition}& \text{(iii) Slime moulds}\\ \text{D. Plasmodium}& \text{(iv) Dinoflagellates}\end{array}$

1. A-(ii), B-(iv), C-(i), D-(iii)
2. A-(ii), B-(iv), C-(iii), D-(i)
3. A-(ii), B-(iii), C-(i), D-(iv)
4. A-(i), B-(iv), C-(iii), D-(ii)

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.

Are most Protists parasitic?

Q. Trypanosoma gambiense causes

1. dysentery
2. sleeping sickness
3. malaria
4. plague

Q. Assertion: Amoebiasis is caused by Amoeba
Reason: The protist feeds on red blood corpuscles.

1. Both Reason and Assertion are true and reason is the correct explanation of assertion.
2. Both assertion and reason are true but reason is not the correct explanation of assertion.
3. Assertion is true but reason is false
4. Assertion is false but reason is true

Q. Match Column-l with Column-ll and select the correct option from the codes given below.

$\begin{array}{cc}\text{Column-I}& \text{Column-II}\\ \text{A. Chief producers in oceans}& \text{(i) Euglenoids}\\ \text{B. Red tides}& \text{(ii) Diatoms}\\ \text{C. Mixotrophic nutrition}& \text{(iii) Slime moulds}\\ \text{D. Plasmodium}& \text{(iv) Dinoflagellates}\end{array}$

1. A-(ii), B-(iv), C-(i), D-(iii)
2. A-(ii), B-(iv), C-(iii), D-(i)
3. A-(ii), B-(iii), C-(i), D-(iv)
4. A-(i), B-(iv), C-(iii), D-(ii)

Q. The contractile vacuole found in some of the Protists like the Amoeba is analogous to vertebrate

1. sweat glands
2. lungs
3. rectum
4. uriniferous tubules

Q.

The organisms having mesoglea lack________

1. Gastro vascular cavity

2. Tissues

3. Intracellular digestion

4. Nervous system

Q. The chief advantage of encystment in an amoeba is :

1. The ability to survive during adverse physical condtions
2. The ability to live for some time without ingesting food
3. Protection from parasites and predators
4. The chance to get rid of accumulated waste products

Q. The classification of protists is based upon

1. mode of reproduction
2. mode of nutrition
3. nature of cell wall
4. habitat

Q.

Are protists parasites?

Q. Presence of two types of nuclei - micronucleus and macronucleus - is a characteristic of which group of Protista?

1. Sporozoa
2. Ciliata
3. Flagellata
4. Sarcodina

Q. Identify the protozoan which is not free living among the following.

1. Euglena
2. Amoeba
3. Giardia
4. Noctiluca

Q. Which of the following unicellular organisms has a macro-nucleus for trophic function and one or more micro-nuclei for reproduction?

1. Euglena
2. Amoeba
3. Paramecium
4. Trypansoma

Q. Trypanosoma gambiense causes

1. dysentery
2. sleeping sickness
3. malaria
4. plague

Q. Planaria possess high capacity of:

1. metamorphosis
2. regeneration
3. alternation of generation
4. bioluminescence