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

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.

Write down two characteristics of foraminiferans?

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

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 is the function of pellicle in ciliates?

• Ans 1: Pellicle that gives ciliates a definite but changeable shape.

Name any three phylum of protoctista.

• Ans 1: Three phyla of protoctista are
  1. Protozoa
  2. Algae
  3. Fungi like protists

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.

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.

How do ciliates differs from other protozoans?

• Ans 1: Ciliates differs from other protozoans because they have other covering called pellicle and two nuclei.One is called macronucleus and other is called macronucleus.

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.

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.

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.

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.

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.

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.

Write down two characteristics of foraminiferans?

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

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.

Why pelomyxa palustris may be the most primitive off all eukaryotic like forms?

• Ans 1: The giant amoeba Pelomyxa palustris may be the most primitive eukaryote.This species has multiple membrane bounded nuclei but none of the other organelles found in all other eukaryotes,The giant amoeba obtains energy from methanogenic bacteria,which reside inside them.

What are trichonymphas? Give its important.

• Ans 1: Trichonymphas are complex,specialized flagellated with many flagella which live as symbionts in the gut of termites and help in the digestion of dry wood.

Name four Phyla of Algae.

• Ans 1: Chlorophyta,Rhodophyta,Phaeophyta and Euglenophyta.

What is zooflagellates? Give one example.

• Ans 1: The protists are mostly unicellular organisms with spherical or elongated bodies with single central nucleus.They possess from one to many whip-like flagella.Example are trichonymphas

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.

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 is sleeping sickness?

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

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.

How do ciliates differs from other protozoans?

• Ans 1: Ciliates differs from other protozoans because they have other covering called pellicle and two nuclei.One is called macronucleus and other is called macronucleus.

What are pigments found in algae?

• Ans 1: Chlorophyll Carotenoids,Xanthophylls,Phycoerythrin

Name four major groups of kingdom protista.

• Ans 1:
  Protozoans: Animals like protista.

  Unicellular Algae: Plants like protista.

  Multicellular Algae: Plants like protista.

  Slim molds and water molds: Fungi like protista.
  
  

Write two distinguished character of kingdom protista.

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

What are actinopods?

Name four Phyla of Algae.

• Ans 1: Chlorophyta,Rhodophyta,Phaeophyta and Euglenophyta.

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.

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.

From where do giant amoebas get energy?

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

Write down phylum,form,pigments and example of red algae.

• Ans 1: Phylum Rhodophyta,forma is multicellular ,pigments phycoerythrin,example polysiphonia.

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.

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.

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.

What is zooflagellates? Give one example.

• Ans 1: The protists are mostly unicellular organisms with spherical or elongated bodies with single central nucleus.They possess from one to many whip-like flagella.Example are trichonymphas

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 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