The structure in the image provided is of the womb of a pregnant woman. The major function of Structure X is to exchange materials between the mother and the fetus.
The correct answer to this question is this one: they lacked oxygen. The earliest organisms were completely heterotrophic in nature because of the reason that they lacked oxygen. <span>A heterotroph is an organism that cannot fix carbon and uses organic carbon for growth. </span>
Serine, threonine, and tyrosine are most commonly phosphorylated in eukaryotes.
Answer:
i think is D water pollution, logging and mining
1) A
2) B
3) B
4) C
5) B
6) C
7) D
8) B
9) A
10) A
