B) Kingdom
C) Order
D) Phylum
Answer: Phylum
Explanation:
A notochord can be defined as the beginning to the backbone which is primitive. It appears in the embryos as a flexible rod which is made from the germ layer called as mesoderm.
It is one of the 3 layers that is found in the body. These layers are ectoderm, endoderm and mesoderm.
Notochords are only found in the phylum chordata. This phylum belongs a group of animals which includes human.
a) as a liquid
b) as a gas
Answer : The number of moles of is, moles.
Solution :
As we know that,
1 mole contains number of molecules
As, number of molecules of are present in 1 mole of
So, number of molecules of are present in moles of
Therefore, the number of moles of is, moles.
The person whose work led to a periodic table based on increasing atomic number was Henry Moseley.