When organisms and plants died and sank to the bottom of swamps and oceans, brown soil-like materials called peat are formed. Over millions of years, the peat became covered with sand, clay and other minerals and the peat is converted into layers of sedimentary rocks. After a long time, different type of fossil fuels are formed.
Answer:They are all controlled by the human beings.
Explanation:
The selective breeding, cloning and genetic engineering are some of the techniques which is induced by the human efforts.
In case of selective breeding the male and female species having the selective characters are mated with each other so that the offspring produced has the desired characters. It neither requires any enzyme nor uses udder cells.
In case of genetic engineering, the gene of interest is inserted in the bacterial species by the help of vector so that when the bacterial species amplify the gene of interest. This is how the desired products are produced by bacterial species. Example: Insulin production.
Cloning can be defined as another technique made by human beings in which the genetically identical species is made naturally or artificially for the benefit of the mankind.
a. 1.505 x 10²⁴
b. 4.37 x 10²⁴
c. 2.34 x 10²⁴
d. 8.127 x 10²³
<h3>Further explanation</h3>
Given
Number of moles of elements
Required
The number of particles
Solution
1 mol = 6.02 x 10²³ particles(molecules, ions, atoms)
Can be formulated :
N = n x No
No = Avogadro's number
n = mol
a. 2.5 mo Ca x 6.02 x 10²³ = 1.505 x 10²⁴
b. 7.26 mol Al x 6.02 x 10²³ = 4.37 x 10²⁴
c. 3.89 mol S x 6.02 x 10²³ = 2.34 x 10²⁴
d. 1.35 mol Pb x 6.02 x 10²³ = 8.127 x 10²³
