1. What are the unisexual organisms?
2. What is external fertilisation ? Name one organism that exhibits external fertilisation.
3. Name the reproductive organs of the human female.
4. Describe viviparous and oviparous animals.
5. Describe fertilisation in humans.
Answers
Explanation:
1) A unisexual organism of a bisexual species is one in which the male and female gonads are found in separate individuals. In plants this condition is often called dioecism. A unisexual species is one in which all individuals are of the same sex. Some species of whiptail lizards, for example, are only female.
2) External fertilization is a mode of reproduction in which a male organism's sperm fertilizes a female organism's egg outside of the female's body. ... The release of eggs and sperm into the water is known as spawning. In motile species, spawning females often travel to a suitable location to release their eggs.
3) A female's internal reproductive organs are the vagina, uterus, fallopian tubes, and ovaries. The vagina is a muscular, hollow tube that extends from the vaginal opening to the uterus. Because it has muscular walls, the vagina can expand and contract
4) Oviparous and viviparous are such two methods. ... This means oviparous animals lay eggs. These eggs develop and hatch into young individuals. In contrast, viviparous animals are born as live young individuals. Therefore, they do not lay eggs.
5) Human fertilization is the union of a human egg and sperm, usually occurring in the ampulla of the fallopian tube. The result of this union is the production of a zygote cell, or fertilized egg, initiating prenatal development. ... The process of fertilization involves a sperm fusing with an ovum.