1 point 4.) A large aquarium should contain 10,000 liters of water when it is filled
correctly. It will overflow if it gets up to 12,000 liters. The fish will get sick if
it gets down to 4,000 liters. The aquarium has an automatic system to help
keep the correct water level. If the water level is too low, a faucet fills it. If
the water level is too high, a drain opens. One day, the system stops
working correctly. The drain opens draining the water at a rate of 20 liters
per minute. How many minutes will it take before the fish start to get sick?

the answer is; biodiversity resulting from few ancestors

adaptive radiation occurs when a population is subjected to a large natural environment with spatial ecological variations. the parts of the population in the different ecologies begin to adapt to their local environments. due to non-random mating across the large populations, this causes the different populations from the large population to speciate within their local environments. they, therefore, diverge to different species sharing a common ancestor.  

answer:

it is general formula that is used to write value to its excet position

a11 a12 a13

a21 a22 a23

it is the example of order 2 by 3 matrix in this

a11 means value occur in 1 st row 1st column

a12 means value occurs in 1st row 2nd column

a13 means value occur in 1st row and 3rd column

a21 means value occurs in 2nd row and 1st column

a22 means value occurs in 2nd row and in 2nd column

a23 means value occurs in 2nd row and in 3rd column