Mendel's Work
Gregor Mendel was the first to carry out scientific studies on transmission of characteristics from the parent to the offspring. He selected garden peas as they showed many contrasting traits that were easy to track through the generations. Moreover, these plants are naturally self-pollinated. This..
Question 1
Question: Lightly, O lightly we bear her along, She sways like a flower in the wind of our song; She skims like a bird on the foam of a stream, She floats like a laugh from the lips of a dream. Gaily, O gaily we glide and we sing, We bear her along like a pearl on a..
Transfer RNA (tRNA)
It represents about 10 to 15% of the total RNA in the cell. It has the shortest molecule having only about 80 to 100 nucleotides. The polynucleotide chain is folded on itself to have the shape of a cloverleaf. The molecule has three lateral loops -a DHU loop, a t loop and an anticodon loop. The an..
Transfer RNA (tRNA)
It represents about 10 to 15% of the total RNA in the cell. It has the shortest molecule having only about 80 to 100 nucleotides. The polynucleotide chain is folded on itself to have the shape of a cloverleaf. The molecule has three lateral loops, a DHU loop, a t loop and an anticodon loop. The an..
Pollination
The pollen grains which produce the male gametes and the ovules which bear the female gametes are borne on different structures. It therefore becomes necessary that for sexual union to occur, the pollen grains must be transferred to the stigma. The transfer and deposition of pollen grains..
Process of Flowering
Reproductive phase in a plant starts with the initiation of flowering. Some plants flower in a particular season only, some flower throughout the year. Plants like Agave, bamboo and certain palms bear flowers only once in their life time. Such plants are known as monocarpic. The sta..
Question 3
Question: Match the following: A B Lightly O Lightly Simile She floats like a laugh Refrain We bear her along like a pearl on a string Repetition ABLightly O LightlySimileShe floats like a laughRefrainWe bear her along like a pearl on a stringRepetiti..
In Industry
In is used in the manufacture of paper, plastic and metal sheets. (Used to control the thickness of the sheets.) Radioisotopes can be used to estimate the amount of wear in bearings. Leaks in pipes may be traced by introducing a small quantity of radioisotopes into the fluid in t..
stamens
Androecium is the male reproductive part of the flower. The individual units of androecium are called the . Stamens have four-lobed anthers that produce the male gametes within the pollen grains. Gynoecium is the female reproductive part of the flower. The individual units are called the carpe..
Law of Multiple Proportions
Proposed by Dalton in 1803, this law states that: 'When two elements combine to form two or more compounds, then the different masses of one element, which combine with a fixed mass of the other, bear a simple ratio to one another'. This law is evident when one element combines with anot..
Result
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