Answer:
1. Ses cells are called (ses? or sex?)
- Female (gametes) sex cells are called egg cells, and male (gametes) sex cells are called sperm.
2. Garetes are both released
and developed in the surroundings (garetes or gametes?)
- Gametes (germ cells) are produced in the gonads. In females, this is called oogenesis and, in males, spermatogenesis.
3. Fertilized egg
- The fertilized egg or zygote divides repeatedly as it moves down the fallopian tube to the uterus. First, the zygote becomes a solid ball of cells. Then it becomes a hollow ball of cells called a blastocyst.
4. Produced by ovary
- The ovaries produce the egg cells, called the ova or oocytes.
5. Fusion of sex cells
- This fusion of gametes is called fertilisation.
6. The fusion of sex cells is
needed to produce a new organism
- In sexual reproduction new organisms are produced from the fusion of a male sex cell with a female sex cell. This fusion of gametes is called fertilisation.
7. Developed zsgote.
- After this two-week period of cell division, the zygote eventually becomes an embryo. If this goes well, the embryo becomes a fetus.
8. Manufacture sperm cells
- Sperm develop in the testicles within a system of tiny tubes called the seminiferous tubules. During puberty, testosterone and other hormones cause these cells to transform into sperm cells.
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