'Cry gene' prevents which crop from bollworms?

$I.$ Recombinant $DNA$ technology popularly known as genetic engineering is a stream of biotechnology which deals with the manipulation of genetic material by man in vitro

$II. pBR322$ is the first artificial cloning vector developed in $1977$ by Boliver and Rodriquez from $E$. coli plasmid

$III.$ Restriction enzymes belong to a class of enzymes called nucleases

Which of the statements given above are correct?

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A childless couple can be assisted to have a child through a technique called GIFT. The full form of this technique is:

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Population growth is reduced by the environmental resistance. This phase is

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Which of the following statements are correct about Klinefelter's Syndrome?

$A$. This disorder was first described by Langdon Down $(1866)$.

$B$. Such an individual has overall masculine development. However, the feminine developement is also expressed.

$C$. The affected individual is short statured.

$D$. Physical, psychomotor and mental development is retarded.

$E$. Such individuals are sterile.

Choose the correct answer from the options given below:

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Generally threshold of sound intensity for human is :

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Endosperm in Angiosperm is

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At the end of first meiotic division, male germ differentiates into.

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Approximately how much of the solar energy that falls on the leaves of a plant is converted to chemical energy by photosynthesis?

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Biotechnology and its Applications — BIOLOGY STD 12 Science — Question

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