Today paper ```BT101``` Time 7:30am 14 June 2023 *Short Questions* ??What is asstivation? ??Define transpiration, groundwater, percolation. ??What is vestigial organs and their associative evolution. *Long Questions* ??Properties of r-selected species. ?? note on invasive species. *MCQs* 1. Adult human body contains --- *60%* -- of water by weight. 2. - *community* --- is a group of population occupying same space in a particular time. 3. First evolutionary scheme was proposed by jean Baptiste Lamarck in - *1809* - 4. 541 million years ago, O2 made stable - *15%*-of atmosphere. 5. ----is Removal of a forest or stand of trees from land which is then converted to a non-forest use. - *Deforestation*- 6. The second major layer of Earth?s atmosphere is -( *Stratosphere*)- 7. Rise in mean temperature of 0.6-1.0?C in arid coastal areas, arid mountains and hyper arid plains - *Pakistan* - 8. 3 oxygen atom form -( *ozone* .)- 9. Which layer of atmosphere is above thermosphere --- *exosphere* --- 10. Organisms that kill and eat another organisms is called -- *predator* -- and other is called prey. 11. - *predator* -- indirectly increase plant growth. 12. Complexity of ecosystem is a --- 13. When a population reaches a high - *density* -, there are more individuals trying to use the same quantity of resources. 14. Complexity of ecosystem makes it more - *stable*- 15. Variety of causes, independently or in concert, are responsible for - *extinctions*-