কাজ
ইবোলা ভাইরাস রোগ
0 Answers
Two green plants are kept separately in oxygen , one in the dark and the other in continuous light. Which one will live longer? Give reasons.
Plant kept in continuous light will live longer, because it will be able to produce oxygen required for its respiration by the process of photosynthesis.
1 Answers 4 views
How are living organisms dependent on the soil? Are organisms that live in water totally independent of soil as a resource?
Almost all living organisms are dependent on soil. Some depend directly, while some depend indirectly. Plants need soil for getting support as well as nutrients to prepare their food. On...
1 Answers 1 views
What is the major source of fresh water in the city/town/village where you live?
River is a major source of fresh water.
1 Answers 1 views
Why can’t sea animals live in distilled water?
Due to the absence of free oxygen in the distilled water
1 Answers 1 views
If you live in a overcrowded and poorly ventilated house, it is possible that you may suffer from which of the following diseases
(c) Air borne diseases
1 Answers 1 views
Who discovered ‘vaccine’ for the first time? Name two diseases which can be prevented by using vaccines.
Edward Jenner. Example— Small pox, Polio
1 Answers 1 views
Which do you think is a more basic characteristic for classifying organisms? (a) the place where they live.
The kind of cells an organism is made of is more basic characteristic of classifying organism because it gives a scientific angle to classification. Moreover, a particular dwelling place can...
1 Answers 1 views
Most living organisms cannot survive at temperature above 45°C. How are some microbes able to live in habitats with temperatures exceeding 100°C?
Archaebacteria (Thermophiles) are ancient forms of bacteria found in hot water springs and deep sea hydrothermal vents. They are able to survive in high temperatures (which far exceed 100°C) because...
1 Answers 1 views
A wine maker and a molecular biologist who has developed a recombinant vaccine, both claim themselves to be biotechnologist.
Both. As biotechnology is a very wide area which deals with techniques of using a ‘natural’ organism (or its parts) as well as genetically modified organism to produce products and...
1 Answers 1 views
A wine maker and a molecular biologist who has developed a recombinant vaccine
Both. As biotechnology is a very wide area which deals with techniques of using a ‘natural’ organism (or its parts) as well as genetically modified organism to produce products and...
1 Answers 1 views