Answer:
As I think Option C is the correct one.
Explanation:
External plant structures such as leaves, stems, roots, flowers, fruits, and seeds are known as plant organs. Each organ is an organized group of tissues that works together to perform a specific function.
Percentage of human sperm cells carry an X chromosome is C 50%
Answer:it begins at conception
Ans terminated at birth.
The entire period takes 9months.
Conceptions begins with the fertilization of the sperm with the Oocyte.It is followed with the implanta tion of tje EMBRYO on the walls of the uterus for supply of needed nutrients and removal of wastes by the mother.The tissues that does this are called collectivly the PLACENTA
Detachment of the placenta from the mother signified labor.
Explanation:
They need it to surviveeeee