Salt concentration (salinity) of the sea measured in parts per thousand is
$10-15$
$30-70$
$0-5$
$30-35$
Formation of tropical forests needs mean annual temperature and mean annual precipitation as
$18-25^{\circ} \mathrm{C}$ and $150-400 \mathrm{~cm}$
$5-15^{\circ} \mathrm{C}$ and $50-100 \mathrm{~cm}$
$30-50^{\circ} \mathrm{C}$ and $100-150 \mathrm{~cm}$
$5-15^{\circ} \mathrm{C}$ and $100-200 \mathrm{~cm}$
Which of the following forest plants controls the light conditions at the ground?
Lianas and climbers
Shrubs
Tall trees
Herbs
What will happen to a well growing herbaceous plant in the forest if it is transplanted outside the forest in a park?
It will grow normally
It will grow well because it is planted in the same locality
It may not survive because of change in its micro climate
It grows very well because the plant gets more sunlight
If a population of 50 Paramecium present in a pool increases to 150 after an hour, what would be the growth rate of population?
50 per hour
200 per hour
5 per hour
100 per hour