Q. In next half century, number of people over age 75 will rise from 8 million to

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Q. Removed ectoderm from a frog's embryo developed

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Q. Gene controlled substances are mostly present in the

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Q. Cylinders of dividing cells contributing to secondary growth are called

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Q. Acetabularia crenutala has a

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Q. In center of blastoderm, cells are

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Q. Carbondioxide is essential for plants to carry out process of

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Q. Zygote contains complete information about individual in form of

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Q. Leaf and shoot primordia develop from

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Q. Cell divisions are enhanced by effect of

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Q. If cap of acetabularia is removed,

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Q. Increase in intensity of light increases

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Q. Two species of acetabularia have been identified on basis of

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Q. From rhizoid of acetabularia, a stalk arises having a

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Q. Leaf primordial are cells committed to become

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Q. Reciprocal relationship between growth and development is known as

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Q. Cells at periphery of blastoderm are

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Q. Cells responsible for increase in number of cells at tips of roots and stem are

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Q. Immediately after fertilization, egg undergoes a series of divisions called

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Q. In artificial incubators, temperature is usually regulated between

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