ANSWER THESE QUESTIONS -:
5. Give the scientific term for the following:
(i) A male hormone. (ii) Female gamete in human beings.
(iii) Cell produced after fertilization of gametes.
(iv) Part of the female reproductive system where fertilization takes place.
6. How does the development of an adult frog take place from the eggs?
7. Distinguish between thermosetting and thermoplastics on the basis of:
(a) Effect of heat (b) Nature (c) Toughness
8. Mother gives birth to a baby but the baby has characters of both parents. How?
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Answers
Answer:
Cell produced after fertilization of gametes.
Gametes are mature, haploid cells that develop from germ cells following meiosis, mitosis, and cell differentiation. During the process of fertilization, a series of reactions triggers the fusion of gametes to produce a diploid cell called a zygote. ...
Part of the female reproductive system where fertilization takes place.
Fallopian tubes: These are narrow tubes that are attached to the upper part of the uterus and serve as pathways for the ova (egg cells) to travel from the ovaries to the uterus. Fertilization of an egg by a sperm normally occurs in the fallopian tubes.
How does the development of an adult frog take place from the eggs?
A female frog lays eggs in the water, which are fertilized by sperm from a male frog. The resulting zygote goes through embryonic development to become a free-living tadpole, which then metamorphoses into an adult frog—for instance, by losing its tail through programmed cell death, or apoptosis.
Distinguish between thermosetting and thermoplastics on the basis of:
(a) Effect of heat (b) Nature (c) Toughness
The primary difference between the two is that Thermoset is a material that strengthens when heated, but cannot be remolded or heated after the initial forming, while thermoplastics can be reheated, remolded, and cooled as necessary without causing any chemical changes.
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