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Feb 7, 2015

#### Differentiate between aquaculture and pisciculture.



Aquaculture means Process of growing any aquatic animal. Pisciculture:It means process of growing particularly fishes

May 24, 2015

####  What are complementary genes and supplementary genes?



Complementary genes are the genes which are present on different genetic loci but interact with each other to express a single character in combination. That is they both together produce...

Jan 31, 2014

#### Reproduction?



Sexual reproduction is considered to be a better mode of reproduction because it creates a hybrid that has more vigor than the parents.

Jan 31, 2014

#### What is the function of tail in sperm?



The sperm cell has a long tail like flagella. The tail is made of protein fibres which contract on alternative sides, giving it a wavelike movement (snake-like motion).  The main fun...

Jan 25, 2015

#### What is microsporangium? With the help of a diagram, represent the location of a microsporangium.



Microsporangium is the sporangial structure which contains microspores which are the pollen sacs giving rise to male gametes in an angiosperm.
T.S of anther shows the four lobes fo...

May 6, 2015



Apr 25, 2015

#### State one advantage and disadvantage of cleistogamy.



Cleistogamy is the self pollination occurring in an unopened flower.
This type self-pollination does not require external agent.
It preserves useful...

Feb 24, 2015

#### What is an ecosystem?



An ecosystem can be natural or artificial. Organisms in the ecosystem can be categorised into producers, consumers and decomposers. Food chains describe the feeding relationship between t...

Apr 13, 2015

#### List two advantages of using unleaded petrol as a fuel in automobiles.



The unleaded petrol does not have lead compound which produce harmful gases, So it does not emit harmful gases into the environment.A cracking process take plac...