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प्रश्न
Differentiate
Sexual Reproduction and Asexual Reproduction.
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उत्तर
| Sexual Reproduction | Asexual Reproduction |
| It involves gametes. | No gamete formation. |
| Two individuals are needed. | One individual involves in this reproduction. |
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संबंधित प्रश्न
Describe the function of placenta.
The pituitary hormone which stimulates contraction of uterus during child birth.
Describe the process of fertilisation in humans and development of embryo briefly.
When a human female reaches a certain age then vaginal bleeding occurs for a few days after regular time intervals.
(a) What is this process known as (i) in scientific terms, and (ii) in everyday language?
(b) At what approximate age this process starts in human females? When is the human female said to have attained at this stage?
(c) After how much time is this process repeated? For how many days does this process usually last?
(d) What does the onset of this process in human females signify?
(e) At which particular event in the life of a human female does this process stop temporarily but start again?
(f) At which approximate age of human female does this process stop permanently?
The germ cell A produced by a person X is round in shape and it fuses with another germ cell B having a long tail and produced by a person Y. The fusion of A and B produces a new cell C. The cell C divides repeatedly and grows inside the organ D of person X to form E in which the body features of the unborn baby are not much developed. E grows further to form F in which the various body features of the unborn baby (like hands, legs, head, eyes, and ears, etc.) can be identified. F grows further and ultimately forms a baby. What are A, B, C, D, E and F? Out of the two persons X and Y, which one is male and which one female?
Rewrite the terms in the correct order so as to be in a logical sequence.
Implantation, ovulation, child birth, gestation, fertilisation.
Write two examples of sexually transmitted diseases caused by virus.
Draw a sectional view of human female reproductive system and label the following parts :
(i) Where the development of egg occurs.
(ii) Where fertilization takes place.
Choose the correct answer:
Fertilization occurs in _____________
Mention the importance of the position of the testes in humans.
