Answer: Lungs
Explanation: The pleura encloses each lung by a double layered serous membrane
Answer:
I think it is the first one
There is more solute in the roots
Cells are combined in a structure called tissue wich have the same properties like the cells wich are formed by.
Answer:
Due to presence at early days of the planet.
Explanation:
We only find the remains of single celled organisms in the oldest fossils because the single celled organisms are the organisms that were present in the early days of this planet. These single celled microbes were present about 3.7 billion years ago while on the other hand, the oldest rocks are only a little older i. e. 3.8 billion years so these single celled organisms are considered as oldest fossils on this planet.
Answer: C. is your answer
