December 18, 2014

Junior Inter Botany Important Questions for IPE Exams in AP and TS

Q: What is growth? What is the difference between the growth in living organisms and growth in non-living objects?
A: Increase in mass and volume of an individual is called growth.
Growth in living organisms is internal which occurs by cell division.
Growth in non-living objects is external that is by accumulation of materials outside.

Q: Define metabolism. What is the difference between anabolism and catabolism?
A: Metabolism is the sum total of all chemical reactions occurring in the body of a living organism.
Anabolism refers to the synthesis of bigger molecules from small molecules during chemical reactions. In one way it is a constructive process.
Catabolism is the breakdown of bigger molecules into smaller ones. It is a destructive or lytic process.

Q: What is the nature of cell-walls in diatoms?
A: The cell wall in diatoms is made up of two overlapping halves called epitheca and hypotheca which give the appearance of a soapbox. It is made up of hard and indestructible silica.

Q: How are viroids different from viruses?
A: Viroids differ from viruses in lacking a protein coat.
Ex: Potato spindle tuber viroid. Viroid contains only nucleic acid (RNA) whereas virus contains nucleic acid and protein coat.

Q: What do the terms 'algal blooms' and 'red tides' signify?
A: The vast colonies and filaments of algae which are found in polluted water bodies are called algal blooms.
The rapid multiplication of red dinoflagellates like Gonyaulax makes sea water appear red which are called red tides in Mediterranean Sea.

Q: State two economically important uses of heterotrophic bacteria.
A: Heterotrophic bacteria are used in production of antibiotics.
Rhizobium is used in fixing atmospheric nitrogen in agricultural lands.
Lactobacillus is used in making curd from milk.

Q: Name the branches of Botany which deal with the chlorophyllous autotrophic thallophytes and non-chlorophyllous heterotrophic thallophytes.
A: Phycology deals with algae (chlorophyllous autotrophic thallophytes).
Mycology deals with fungi (non-chlorophyllous heterotrophic thallophytes).

Q: Which group of plants is called vascular cryptogams? Name the branch of Botany which deals with them?
A: Pteridophyta. Pteridology.

Q: Who discovered the cell and what was the book written by him?
A: Robert Hooke.

Q: What is the basis of classification of algae?
A: a) Pigmentation and
b) Type of food stored.

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