The energy-rich compound needed by organism is : Carbohydrates
Carbohydrates consist of the combination of the existing Carbon, Hydrogen, and Oxygen alone.
For human, The source of carbohydrates could be found in almost every food, but the huge amount could be found in rice, potato, corn, cassava, oatmeal, etc
hope this helps
You will notice that a plant cell has a cell wall, whereas animal cells do not have a cell wall.
Answer: D = { x ∈ R - {-2, 1}}
Explanation:
The domain of a function f(x) is the set of all the possible values of x that we can input in our function.
For this particular function, we can see two divergences (meaning that there are two values of x where the function goes to infinity)
Those values, that in the graph are signalized with a dotted red line, are:
x = 1 and x = -2
(you need to count the squares, each square is 1 unit)
So this two values give problems to our function, this means that those values do not belong in the domain of our function.
Then the domain of our function is the set of all the real numbers except the numbers x = -2 and x = 1.
We can write this as:
D = { x ∈ R - {-2, 1}}
there says " x belongs to the set of all the real numbers minus the set of -2 and 1"