Question 1

The correct sequence of stages of growth curve for bacteria is:

Accepted Answer

Correct answer is B

Question 2

The thalloid body of a slime mould (Myxomycetes) is known as:

Accepted Answer

Correct answer is D

Question 3

Which of the following are the characters of dinoflagellates?A. Planktonic golden yellow algae with soap box like structureB. Marine red biflagellated protistaC. Appear yellow, green, brown, blue and red in colourD. Biflagellated organisms with pellicleE. Saprophytic (or) parasitic unicellular forms.

Accepted Answer

Correct answer is C

Question 4

Planktons are organisms which:

Accepted Answer

Free floating living protist are collectively called plankton, which are float on the water surface.

Question 5

If phytoplanktons are destroyed in the sea, then:

Accepted Answer

Because in sea ecosystem, phytoplanktons are primary producers, if they are destroyed, naturally food chain.

Question 6

Which one of the following is a saprophytic protist?

Accepted Answer

Correct answer is B

Question 7

Slime moulds in the division Myxomycota (true slime moulds) have:

Accepted Answer

The slime moulds are included into the division myxomycota by mycologists. The spores of slime moulds (acellular) germinate to produce biflagellate swarm cells which function as gametes.

Question 8

All eukaryotic unicellular organisms belong to :

Accepted Answer

(b) Protista

Question 9

Naked cytoplasm, multinucleated and saprophytic are the characteristics of :

Accepted Answer

(d) Slime moulds

Question 10

What is the alternative name of 'consumer decomposer protists'?

Accepted Answer

Slime moulds.

Question 11

Define myxamoeba.

Accepted Answer

It is Amoeba like naked uninucleate cell of slime mould which can undergo independent feeding, growth and multiplication.

Question 12

What kind of organisms does kingdom Protista include?

Accepted Answer

The kingdom Protista includes diverse kinds of unicellular and primarily aquatic, eukaryotic organisms.

Question 13

Which of the following are the characters of dinoflagellates?(A) Plankton c golden yellow algae with soap box like structure.(B) Marine red biflagellated protista.(C) Appear yellow, green, brown, blue and red in colour.(D) Biflagellated organisms with pellicle.(E) Saprophytic (or) parasitic unicellular forms

Accepted Answer

(c) B and Conly

Question 14

Chrysophytes, euglenoids,dinoflagellates and slime moulds are included in the kingdom

Accepted Answer

All single celled eukaryotic organisms like chrysophytes [diatoms and desmids], euglenoids [Euglena], dinoflagellates and slime moulds are included in kingdom - Protista.

Question 15

Macro and micronucleus are the characteristic feature of

Accepted Answer

Paramecium and Vorticella have dimorphic nuclei (heterokaryotic). Micronucleus that is inactive except during cell division and houses the master copy of the genome. Macronucleus controls daily synthetic activities or on going metabolic functions of the cell and asexual reproduction. Macronucleus contains multiple copies of DNA.

Question 16

In Amoeba and Paramecium osmoregulation occurs through

Accepted Answer

Amoeba and Paramecium contains two contractile vacuoles (anterior and posterior, the latter being faster) for osmoregulation, i.e. maintaining water balance in the body.

Question 17

Excretion in Amoeba occurs through

Accepted Answer

Endoplasm of Amoeba in thhe posterior part contains a single clear nounded and pulsating contractile vacuole. Contractile vacuole is analogous to uriniferous tubules of frog, it functions in excretion and osmoregulation.

Question 18

Genetic information in paramecium is contained in

Accepted Answer

Ciliates (Paramecium) show nuclear dimorphism, large macronucleus controls metabolic activities and growth. It is called vegetative nucleas. Micronuclus contains genetic information and thus, takes part in reproduction.

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Solutions for Protista- Phototsynthetic and consumer protists Important Questions

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