Answer: 550 million years ago according to the internet.
Explanation:
Answer:
B. Biological Evolution
Explanation:
The biological evolution or evolution is a process by which organisms changes over time and the heritable traits are passed on to the successive generations.
The traits which increase the survival rate or reproductive fitness become permanent in the population when they are passed on to the generations.
In the given question, all the organisms possess DNA, use energy and perform metabolic functions is the result of the transfer of the traits as these characteristic feature allows the cells to survive and thus allows the organism to survive in the different conditions.
Thus, Option-B is the correct answer.
Answer:
18.28
Explanation:
Given:
Relation between the absorbance (y) and the concentration (x) as ;
y = 0.057x + 0.069
now,
we have to calculate concentration (x) for the given value of absorbance (y) = 1.111
thus, on substituting the value of y = 1.111 in the above relation, we get
1.111 = 0.057x + 0.069
or
x = 18.28
hence, the <u>value of concentration of sample is 18.28</u>
