The Ph scale measures the acidity or alkalinity of water soluble substances (pHstands for 'potential of Hydrogen'). A pH value is a number from 1 to 14, with 7 as the middle (neutral) point. Values below 7 indicate acidity which increases as the number decreases, 1 being the most acidic.
An emerging virus might suddenly appear in a human population if it is airborne, meaning many people will get it at the same time. This causes the virus to spread, initially making a population be affected.
The repressor protein would not function properly, and the lacl opereon would be over expressed
D. Provision of fresh water is a direct value of biodiversity.
Direct values of biodiversity refer to biological resources that give immediate satisfaction or enjoyment.
Two types of direct values of biodiversity are Consumptive use and productive use.
Fresh water is consumptive use. It is a direct value because we can access fresh water immediate from nature without it going through the market. Other examples of direct value for consumptive use are firewood, fodder and meat.
Answer:
packing down soil. building drains with outlets. increasing the slopes of riverbanks.
