First Year Biology Chapter 7 Online Short Questions for 1st Year Biology Chapter 7 The Kingdom Protista Preparation

Write two distinguished character of kingdom protista.

• Ans 1: Two distinguishing character of protista are :Mode of nutritionMode of reproduction

What is sleeping sickness?

• Ans 1: Trypanosoma is the cause of sleeping sickness which is transmitted by Tsetse fly.

Name the nuclei of ciliates.

• Ans 1: 1.Micronuclei
  2.Macronuclei

What are Dinoflagellates? Give example.

• Ans 1: It is unusual protist phylum.Most of the Dinoflagellates are unicellular.Their cells are often covered with shells of interlocking cellulose plates impregnated with silicates.For example Ceratium and Gonyaulax.

Name a parasite amoeba.What disease does it cause?

• Ans 1: Entamoeba histolytica cause amoebic dysentery.

How foraminiferans are source of limestone?

• Ans 1: Dead foraminiferans sink to the bottom of the oceans where their shells form a grey mud that is gradually transformed into chalk.Foraminiferans of the past have created vast limestone deposits.

Give composition of shells of foraminiferans and actinopods.

• Ans 1: These marins protozoans produce shell(also called as tests).
  Tests of foraminiferans are made of calcium whereas those of actinopods are made of silica.

Write down two characteristics of foraminiferans?

• Ans 1: They are marine protozoans.
  They have external shell or test.

What is thallus?

• Ans 1: The plant body which is not differentiated into root ,stem and leaves and xylem phloem are absent is called thallus.

How is chalk formed?

• Ans 1: Dead foraminiferans sink to the bottom of the oceans where their shells form a grey mud that is gradually transformed into chalk.

What is trypanosoma? What disease does it cause?

• Ans 1: Parasitic flagellates cause diseases.For example Trypanosoma is a human parasite causing African sleeping sickness.It is transmitted by the bite of Tsete fly.

Name two plants like protists group.

• Ans 1: Two plants like protists are green algae and red algae.

How algae differs from plants?

• Ans 1: Plants: Reproductive organs are multicellular.Embryo formation occur.
  Plants is different in to root,stem and leaves with xylem and phloem
• Ans 2: Algae: Reproductive organs of algae are unicellular.Embryo formation is absent in algae.Plant body is thallus like.

What are pigments found in algae?

• Ans 1: Chlorophyll Carotenoids,Xanthophylls,Phycoerythrin

Why kingdom protista is regarded as a polyphyletic group of organisms?

• Ans 1: Based on diversity most biologists regard the protist kingdom as a polyphyletic group of organisms; that is the protists probably do not share a single common ancestor.

Give two characteristics of ciliates.

• Ans 1: They are unicellular organisms with a flexible outer covering called a pellicle that gives them a definite shape but changeable shape.
  Paramecium is one of the most complex ciliate.In parameters the surface of the cell is covered with several thousands fine,short hairs like structure called cilia.

What are ciliates? Give two examples.

• Ans 1: Ciliates have cilia on their outer body surface and pellicle as outer body covering e.g paramecium and Vorticella.

What kind of chlorophylls are found in photosynthetic plants and algae?

• Ans 1: They are photosynthetic with chlorophyll a,chlorophyll b and carotenoids present in the chloroplast.

Write down two characteristics of foraminiferans?

• Ans 1: They are marine protozoans.
  They have external shell or test.

What is Plasmodium?Give name of its host?

• Ans 1: Plasmodium: is a type of apicomplexans that cause malaria in humans.Its hosts are as follows :
  • Human beings
  • Female mosquito Anopheles

Write down any two characteristics of protists.

• Ans 1:
  1. Protists are unicellular,colonial or simple multicellular organisms.
  2. They possess a eukaryotic organization.

What are red tides?

• Ans 1: Dianoflagellates exhibit occasional population explosions or blooms.These blooms frequently color the water orange,red or brown and are called red tides.

Write example of parasitic apicomplexan.Give symptoms of malaria.

• Ans 1: They are large group of parasitic Protozoans which cause serious diseases like malaria in human.They lack structure of locomotion but move by flexing.

Give two characteristics of ciliates.

• Ans 1: They are unicellular organisms with a flexible outer covering called a pellicle that gives them a definite shape but changeable shape.
  Paramecium is one of the most complex ciliate.In parameters the surface of the cell is covered with several thousands fine,short hairs like structure called cilia.

Why kingdom protista is regarded as a polyphyletic group of organisms?

• Ans 1: Based on diversity most biologists regard the protist kingdom as a polyphyletic group of organisms; that is the protists probably do not share a single common ancestor.

What are actinopods?

Highlight evolutionary significance of euglenoids.

• Ans 1: Euglenoids dianoflagellates are one of the most important group of procedures in marine ecosystem.They also cause red tides.

What is thallus?

• Ans 1: The plant body which is not differentiated into root ,stem and leaves and xylem phloem are absent is called thallus.

Write down two characteristics of foraminiferans?

• Ans 1: They are marine protozoans.
  They have external shell or test.

Name a parasite amoeba.What disease does it cause?

• Ans 1: Entamoeba histolytica cause amoebic dysentery.

Basically kingdom protista is defined by exclusion.How?

• Ans 1: It is defined by exclusion all member have the characteristics that excludes (separate) them from the other four kingdoms.Like mode of reproduction ,variety of habits,mode of nutrition,and body structure.

Write two characteristics of Apicomplexans.

• Ans 1: They are large group of parasitic protozoa.Some cause serious disease such as malaria in human.
  They lack specific structure for locomotions but move by flexing.

From where do giant amoebas get energy?

• Ans 1: Giant amoebas obtains energy from methanogenic bacteria,which resides inside them.

What are red tides?

• Ans 1: Dianoflagellates exhibit occasional population explosions or blooms.These blooms frequently color the water orange,red or brown and are called red tides.

What are protists,how they differs from planet and animal?

• Ans 1: The protists are unicellular,colonial or simple multicellular organisms that possess a eukaryotic organization.Unlike plants and animals,protists do not develop from a blastula or embryo.

What is trypanosoma? What disease does it cause?

• Ans 1: Parasitic flagellates cause diseases.For example Trypanosoma is a human parasite causing African sleeping sickness.It is transmitted by the bite of Tsete fly.

Highlight evolutionary significance of euglenoids.

• Ans 1: Euglenoids dianoflagellates are one of the most important group of procedures in marine ecosystem.They also cause red tides.

How algae differs from plants?

• Ans 1: Plants: Reproductive organs are multicellular.Embryo formation occur.
  Plants is different in to root,stem and leaves with xylem and phloem
• Ans 2: Algae: Reproductive organs of algae are unicellular.Embryo formation is absent in algae.Plant body is thallus like.

Give two characteristics of ciliates.

• Ans 1: They are unicellular organisms with a flexible outer covering called a pellicle that gives them a definite shape but changeable shape.
  Paramecium is one of the most complex ciliate.In parameters the surface of the cell is covered with several thousands fine,short hairs like structure called cilia.

Differentiate between foraminiferans and actinopods.

• Ans 1: Foraminiferans : These marine protozoans produce shell (also called as tests).
• Ans 2: Actinopods : Test of foraminiferansare made of calcium whereas those of a actinopods are made of silica.