Explain what happen when: (a) Testosterone is released in males. (b) Pollen grain falls on the stigma of the flower. (c) Eggs fuses with sperm cell. (d) Planaria is cut into many pieces. (e) Buds are formed on the notches of the Bryophyllum leaf.
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Answer:
When an egg and a sperm fuse, they combine into a new cell called a zygote. The zygote contains all the genetic information it needs to become a new individual. This new cell then divides over and over, eventually forming a complete organism with the same genes in each cell.