Question 21
How many eggs do you think were released by the ovary of a female dog which gave birth to 6 puppies?
Answer
Dogs and rodents are polyovulatory species. In these species, more than one ovum is released from the ovary at the time of ovulation. Hence, six eggs were released by the ovary of a female dog to produce six puppies.
Popular Questions of Class 12 Biology
- Q:- What is spermatogenesis? Briefly describe the process of spermatogenesis.
- Q:- Why is reproduction essential for organisms? Answer
- Q:- Write a short note on
(a) Adaptations of desert plants and animals
(b) Adaptations of plants to water scarcity
(c) Behavioural adaptations in animals
(d) Importance of light to plants
(e) Effect of temperature or water scarcity and the adaptations of animals. - Q:- With a neat diagram explain the 7-celled, 8-nucleate nature of the female gametophyte.
- Q:- What is DNA fingerprinting? Mention its application.
- Q:- What is oogenesis? Give a brief account of oogenesis.
- Q:- Describe the structure of a seminiferous tubule.
- Q:- What is triple fusion? Where and how does it take place? Name the nuclei involved in triple fusion.
- Q:- With a neat, labelled diagram, describe the parts of a typical angiosperm ovule.
- Q:- Explain the Law of Dominance using a monohybrid cross.
Recently Viewed Questions of Class 12 Biology
- Q:- What is meant by the term breed? What are the objectives of animal breeding?
- Q:- Is the use of contraceptives justified? Give reasons.
- Q:- List 10 modern-day animals and using the internet resources link it to a corresponding ancient fossil. Name both.
- Q:- What are the various public health measures, which you would suggest as safeguard against infectious diseases?
- Q:- Why ozone hole forms over Antarctica? How will enhanced ultraviolet Radiations affect us?
- Q:- Is sex education necessary in schools? Why?
- Q:- Explain the Law of Dominance using a monohybrid cross.
- Q:- List the harmful effects caused by alcohol/drug abuse.
- Q:- What is the significance of the slope of regression in a species − area relationship?
- Q:- Define and design a test − cross?
6 Comment(s) on this Question
Kaustubh
2019-09-15 22:26:37
Great fabulaus
Simran Kant
2019-05-18 20:03:03
Really thank-you
Zeeshan raees
2019-05-08 21:52:28
Thanks
Sowmi
2019-01-22 21:08:10
Sema. Appð
Aynal Hoque
2018-10-23 10:29:16
Thank\'s, I was confused...
Nilesh Sehrawat
2018-06-12 07:21:57
nice answers:-)
- NCERT Chapter