Answer:
Option B
Explanation:
In the book The Descent of Man published in 1871, Charles Darwin mentioned that the two recent most ancestor of present day human being live in Africa. These two recent ancestors of human beings are—chimpanzees and gorillas
Hence, option B is correct
The name of this common ciliate protist is called Paramecium.
Please correct me if I'm wrong!! I'd be happy to fix it!! :)
The periderm is a multilayered tissue that is different from the epidermis which is single layered. It is made of cork cells (phellem) , phelloderm and phellogen (or cork cambium).
Cork cells are nonliving cells found covering the outside of roots and stems to provide protection and insulation to the plant.
The periderm serves to protect the plant from injury, pathogens, excessive water loss and provides insulation for the plant.
The correct option is this: PROTO ONCOGENES BECOMES ONCOGENES.
Proto oncogenes genes are those genes that regulate the process of normal cell division in the living system. These cells starts cell division when necessary and terminate the cell division when the necessary cells have been formed. When these genes lose the power to regulate cell division, the cells continue to divide indefinitely without stopping and this leads to a medical condition called cancer. At this stage, the proto oncogenes have been turned into oncogenes, which are genes that caused uncontrolled cell cycle divisions.
