1. ____ is not the reason for bio diversity.
Ans : hunting, pollution, destruction of habitats
2. Petroleum will not be used in the production of ____.
Ans : bread mould
3. The method in which plastic can be reused is ____.
Ans : recycling
4. The use of percolation pit is ____.
Ans : increasing ground water level
5. ____ method is to be followed by farmers in scarcity of water.
Ans : drip irrigation
6. ____ happens if plants shed their leaves in autumn season.
Ans : loss of biomass occur
7. ____ can convert the absorbed colour energy sunlight into chemical energy.
Ans : producers
8. The mercury, arsenic and lead in pesticides ____.
Ans : do not breakdown
9. The bio indicators of heavy metal pollutants is ____.
Ans : fishes
10. Between grass and grasshopper food chain ends with ____.
Ans : consumers
11. The characters that transmit from parents to offspring are ____.
Ans : Heritable characters
12. The structure of DNA is ____.
Ans : double helix
13. The study of fossils is called ____.
Ans : paleontology
14. The small changes within the species are called ____.
Ans : Micro evolution
15. The larva of frog resembles to ____.
Ans : Fish
16. The nerve which carries the hunger signals to the brain is ____.
Ans : vagus nerve
17. The papillae which are at the end of tongue is ____.
Ans : folliate papillae
18. The recognition of taste is done by the ___ cells present in the taste buds on the tongue.
Ans : receptor cells
19. The teeth which are used for tearing the food are ____.
Ans : incissors
20. The enzyme which acts on bolus is ____.
Ans : salivary amylase
21. Cotyledons are present in ____.
Ans : seed
22. ____ joins the embryo to the walls of uterus.
Ans : umbillical cord
23. Fission, budding and fragmentation are the types of ____.
Ans : asexual reproduction
24. ____ scientist discovered tissue culture.
Ans : Haberlandt
25. The layer formed around 12th week of pregnancy is ____.
Ans : placenta
