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Organisms And Populations

Question
CBSEENBI12002569
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Some hyperthermophilic organisms that grow in highly acidic (pH2) habitats belongs to the two groups called

  • eubacteria and archaea

  • cyanobacteria and diatoms

  • protists and mosses

  • liverworts and yeasts

Solution

A.

eubacteria and archaea

Thermophiles live in hot places, typically from 60o to 80oC. Many thermophiles (some eubacteria and archaebacteria) are autotrophs and have metabolisms based on sulphur. Some thermophilic archaebacteria form the basis of food webs around deep- sea thermal vents, where they must withstand extreme temperature and pressure. Archaebacteria can grow in highly acidic (pH = 0.7) and very basic (pH= 11) environments.

Some More Questions From Organisms and Populations Chapter

State true or false :

Coin one word for the following statements :

1.Organism that can tolerate only a narrow range of salinity.

2. Plants that can survive a wide range of temperature.

3. Interaction of two species in which one is benefited while other is neither benefited nor harmed.

4. Number of births during a given period in the population that are added to the initial density.

5. the process of maintaing a constant body temperature.

A few organisms can tolerate and thrive in a wide range of temperature, they are called........................

Majority of organisms are restricted to a narrow range of temperature, such organisms are called ........................ 

The organisms ideally try to maintain the constancy of its internal environment by the process called........................

Mammals from colder climates have shorter ears and limbs to minimize heat loss. This rule is called........................ 

The parasites that feed on external surface of host organisms are called ........................

The parasites that live inside the body at different sites (liver, kidney, lungs, RBC etc.) are called........................

List two negative interactions between two species.

What is the  term for cryptic-colouring in organisms to avoid being detected easily by the predator
?

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