Question
A hollow cylindrical tube 20 cm long is made of iron and
its external and internal diameters are 8 cm and 6 cm respectively. The volume (in cubic cm) of iron used in making the tube is (Take pi; = 22/7)Solution
volume of hollow cylinder = pi;(r12 minus; r22)h h = 20 r1 (external radius) = external diameter divide;2 = 8divide;2 = 4 r2 (internal radius) = internal diameter divide;2 = 6divide;2 = 3 volume of hollow cylinder = pi;(42- 32) 20 = 22/7 (7)20 = 440
A technique of genetic engineering in which a DNA probe is hybridized with DNA of a species to determine similarities and differences between tw...
The term given to the ability of single cell to divide and produce all the differentiated cell in the organism.
In Pure lines election a large number of plants are selected from a ………………… and harvested individually
Self pollination leads to a very rapid increase in ……………………….
 The level of heterosis is generally ……………… in cross pollinated species and ……………… in self-pollinated species
...Which of the following acid is used as a preservative in bread preparation method along with sorbic acid?
In  the  pedigree  method,  individual  plants  are  selected  from  …………….. and subsequent generations, and their ...
Which hormone is primarily responsible for inducing the oestrus or heat period in female animals, a phase of their reproductive cycle characterized by r...
Flowers do not open at all which ensures complete self pollination in
The hybrid progeny of single cross and an inbred lines is called
