O B. A mass extinction
O C. The disappearance of land bridges
O D. The end of the last ice age
Answer:
A mass extinction
Explanation:
Answer:
A.
Explanation:
The amount of mass always stays the same, matter cannot be created nor destroyed, it can only change forms. Thus, the answer is A.
In a chemical reaction the total mass of all the substances taking part in the reaction remains the same. Also, the number of atoms in a reaction remains the same. Mass cannot be created or destroyed in a chemical reaction.
I hope this helps..
b. Citrate lyase
c. Acetyl-CoA carboxylase
d. Malate dehydrogenase
Answer:
The maximum number of electrons present in a particular shell is calculated by the formula 2n2, where “n” represents the shell number. For instance, K shell is the first shell and it can hold up to 2(1)2 = 2 electrons. Similarly, L shell is the second shell and it can hold up to 2(2).
30
30x
5x
The answer is 30, A :)