GK-Biology Question and Answer
GK-Biology Question and Answer
31. Prothrombin which helps in clotting of blood is released by
- lymphocytes
- erythrocytes
- monocytes
- blood platelets
33. Most of the red, blue and purple colours of plants are due to a pigment called
- anthocyanin
- carotene
- chlorophyll
- xanthophylls
34. Plants developing in dry conditions are
- xerophytes
- mesophytes
- lithophytes
- hydrophytes
35. Plants growing on sand are called as
- chasmophytes
- oxylophytes
- lithophytes
- psammophytes
36. Our skin, when exposed to excess sunlight, becomes dark. This is because our skin pigments called
- flavoxanthin
- melanin
- carotene
- xanthopny II
37. Ramapithecus and Cro-Magnon man are considered
- ancestors of modern man
- ancestors of monkey
- ancestors of lion
- None of the above
38. Normal adult human male has
- 10 gram of haemoglobin/100 gram of blood
- 14 gram of haemoglobin/100 gram of blood
- 18 gram of haemoglobin/100 gram of blood
- 24 gram of haemoglobin/100 gram of blood
40. Monotremes are unique mammals because they
- posses hair
- give birth to live young
- secret milk in a pouch
- lay eggs