The first sign of life made its appearance on the earth about
1 million years ago
500 million years ago
1 billion or 1000 million years ago
3 billion years ago
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- When does the heart start functioning?
- The two minerals required to keep teeth and bones intact and in good condition are
- Which one is called anti-haemorrhagic vitamin?
- Geotropism is reaction of plants to the stimulus of
- Decomposition of organic matter is due to
- Which of the following organelles is known as the 'power House' of the cell?
- The saliva contains an enzyme called
- Warm-bloodedness
- Evergreen forests are confined to
- The Green Revolution in India owes much to
- Savannah is
- Which among the following cows give maximum milk yields?
- Deciduous forests are those with trees
- Higher plants take up nitrogen as
- The drug Ergot is obtained from
- Which of the following terms is used in Botany?
- Animals that feed only on dead flesh are
- Afforestation means
- Bats can fly in the dark because
- Haemophilia is a hereditary disease carried by
- The amount of blood in a normal man is about
- Fibrinogen is present in
- The dreaded virus which, on reaching the central nervous system, produces spasms of the muscles of the…
- The method of inducing artificial immunity was discovered by
- The function of a cell wall is
- Which of these is most consistently observed in Vitamin B12 deficiency?
- The spores of Puccinia formed on the leaves of wheat are called
- Scrub jungle Is characterised by
- Compared to the veins, the walls of arteries are
- The blood clotting requires the vitamin