4. Asexual reproduction involves only one parent that produces two or more genetically similar organisms. It occurs mainly in organisms with a simple structure. Sexual reproduction involves two parents. A male sex cell joins with a female sex cell (fertilization) and they form a new cell called a zygote. The zygote grows into a new organism.
6. SEXUAL REPRODUCTION Two parents of different sex are involved. The offspring are different from their parents and from each other
7. Gonads produce sexual cells. The gonads in males are the testicles. The gonads in females are the ovaries.
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10. TYPES OF FERTILIZATION Internal fertilization It occurs in terrestrial animals. The male introduce sperm cells in the female’s body (copulation). Sperm cells and ova join inside the mother
15. EMBRYONIC DEVELOPMENT Vivipary. The embryo develops inside the body of the mother. Ovoviviparity. The embryo develops within eggs that remain within the mother's body up until they hatch.
