Advertisements
Advertisements
प्रश्न
What is sexual reproduction? What are its essential features?
उत्तर
It is a type of reproduction usually found in higher animals and plants where male and female sexes produce male and female heterogametes separately, which on fertilisation produce a zygote.
APPEARS IN
संबंधित प्रश्न
What are the changes seen in girls at the time of puberty?
Write the function of the following part in a human female reproductive system:
Fallopian tube
What is the frequency of menstrual cycle in human females (or women)?
How long does a human baby take to develop before birth?
Which among the following are not the functions of testes at puberty?
(i) formation of germ cells
(ii) secretion of testosterone
(iii) development of the placenta
(iv) secretion of estrogen
The diagram below represents two reproductive cells A and B. Study the same and then answer the questions that follow:
 |
- Identify the reproductive cells A and B.
- Name the specific part of the reproductive system where the above cells are produced.
- Where in the female reproductive system do these cells unite?
- Name the main hormones secreted by the (1) ovary (2) testes.
- Name an accessory gland found in the male reproductive system and state the function of its secretion.
Describe in brief the role of vas deferens in human male reproductive system.
Define the term puberty.
Define the following:
Parthenogenesis
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Women after the age of 45 years normally cannot produce children.
