Answer: Option C
Explanation:
Engulfing of the small photosynthetic by a larger cell. The theory of the endosymbiotic states that the ingested bacteria and the host cell can easily become dependent on each other for the survival which results in the permanent relation.
Over millions of year, the mitochondria and the chloroplast have become more specialized and they cannot live outside the cell.
Hence, the correct answer is option C
Answer:
A
Explanation:
Soils rich in humus improve plant growth. Earthworms breakdown organic matter to form humus. From the data, it can be seen that plant growth is high in soil that has humus.
I believe the answer is D, as we can reproduce and we have to be the same biological species to do that
