The minimum level of a pollutant above which a healthy individual worker is adversely affected on exposure to it for 8 hrs in a day is called

The acidification of oceans is increasing. Why is this phenomenon a cause of concern? 1. The growth and survival of calcareous phytoplankton will be adversely affected. 2. The growth and survival of coral reefs will be adversely affected. 3. The survival of some animals that have phytoplanktonic larvae will be adversely affected. 4. The cloud seeding and formation of clouds will be adversely affected. Which of the statements given above is/are correct?

Four potted plants (I,II, III, and IV) of a short day plant, which has the crictical period of 14 hours, are taken and exposed to light for different time periods. The light periods given are listed in the table. |{:("Potted plant","Photoperiod"),(I,10hrs),(II,15hrs),(III,16hrs),(IV,20 hrs):}:| Which potted plant will show flowering after exposure to light?

Four potted plants (I,II, III, and IV) of a short day plant, which has the crictical period of 14 hours, are taken and exposed to light for different time periods. The light periods given are listed in the table. |{:("Potted plant","Photoperiod"),(I,10hrs),(II,15hrs),(III,16hrs),(IV,20 hrs):}:| Which potted plant will show flowering after exposure to light?

Four potted plants (I,II, III, and IV) of a short day plant, which has the crictical period of 14 hours, are taken and exposed to light for different time periods. The light periods given are listed in the table. |{:("Potted plant","Photoperiod"),(I,10hrs),(II,15hrs),(III,16hrs),(IV,20 hrs):}:| Which potted plant will show flowering after exposure to light?

Statement - as the festive season is round the corner, the country is on high alert due to rise in the level of pollution. So, government has given the orders to use green crackers in place of conventional crackers just few days before Diwali. These green crackers are environment friendly and cost effective fire-craker and produce 20-30% less pollution over conventional one. Which of the following is incorrect with respect to the given statement ? (I) Fire crackers release pollutant which in turn mixed with air and cause pollution. (II) In festive season the level of pollution gets increased. (III) The government is taking various steps to decline the level of pollution. (IV) the green fire crackers are quite expensive, so the shopkeepers will have to bear loss.

A food chain consists of fish, larvae , phytoplanktons and birds. The level of pesticides in water in which the fish, larvae and phytoplanktons live is quite high. (a) In which organisms the pesticides enter from the polluted water ? What is the level of organisms known as ? (b) Which organism will have the maximum amount of pesticides accumulated through the food chain ? What is this process known as ? (c) Write the food chain comprising all the organisms mentioned above. (d) Which other organism you could write in place of bird in the above food chain ?

f(x)=(x-8)(x+2) ,brgt Which of the following is an equivalent form of the function above in which the minimum value of function f appears in the equation as a constant?