1) Describe the process of fertilisation in human beings.
OR
Discuss the changes in the voice of boys and girls during adolescence
Answers
A biological process in which the fusion of the male and the female gamete occurs is called fertilization. The sperms are released from the male reproductive organ called the penis. The sperm enters the female body through one of the parts of her reproductive organ called the vagina. Then the sperm travels through the fallopian tubes and meets the egg produced by the female organs. The process of fertilization takes place in fallopian tubes.
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Answer:
1. The process of fertilization involves a sperm fusing with an ovum. ... The sperm plasma then fuses with the egg's plasma membrane, triggering the sperm head to disconnect from its flagellum as the egg travels down the Fallopian tube to reach the uterus.
Sexual reproduction takes place in human beings.
Male reproductive organs(testes) produce sperm (male gametes) while the female reproductive organ(ovaries) produce ova (female gametes).
The sperms are ejected inside female bodies where they fuse with ovum and forms zygote (called internal fertilization).
The zygote begins to develop into an embryo that attaches to the uterus wall of a female.
The embryo further multiplies into many cells and develops further into a stage where all the hands and legs of the baby can be seen as foetus and later, a baby is born.
2. The voice box or the larynx begins to grow during puberty. ... The voice of the boys becomes deep. In boys the voice becomes hoarse temporarily because of the out of control growth of muscles of the voice box. The voice box is growth is less in girls and they have a high pitched voice.
At puberty, the voice box or the larynx begins to grow. Boys develop larger voice boxes. The growing voice box in boys can be seen as a protruding part of the throat called Adam's apple. In girls, the larynx is hardly visible from the outside because of its small size.
Explanation:
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