Explain the following term.  LH surge.

Important Questions on Human Reproduction

EASY

12th ICSE

IMPORTANT

ISC Biology Class XII>Chapter 3 - Human Reproduction>Chapter Practice>Q 22

Explain the following term.
Blastocyst.

HARD

12th ICSE

IMPORTANT

ISC Biology Class XII>Chapter 3 - Human Reproduction>Chapter Practice>Q 23

Differentiate between zona pellucida and corona radiata.

HARD

12th ICSE

IMPORTANT

ISC Biology Class XII>Chapter 3 - Human Reproduction>Chapter Practice>Q 24

Various events occur up to the implantation of the blastocyst in the uterus. State them sequentially.

HARD

12th ICSE

IMPORTANT

ISC Biology Class XII>Chapter 3 - Human Reproduction>Chapter Practice>Q 25

What are the major changes that take place in the foetus during second trimester of the pregnancy?

HARD

12th ICSE

IMPORTANT

ISC Biology Class XII>Chapter 3 - Human Reproduction>Chapter Practice>Q 26

Differentiate between gestation period and pregnancy.

HARD

12th ICSE

IMPORTANT

ISC Biology Class XII>Chapter 3 - Human Reproduction>Chapter Practice>Q 27

Explain the development of a secondary oocyte (ovum) in a human female from the embryonic stage up to its ovulation. Name the hormones involved in this process.

HARD

12th ICSE

IMPORTANT

ISC Biology Class XII>Chapter 3 - Human Reproduction>Chapter Practice>Q 27

When does oogenesis start in humans? Name the three hormones and their sources, linked with oogenesis. Explain.

HARD

12th ICSE

IMPORTANT

ISC Biology Class XII>Chapter 3 - Human Reproduction>Chapter Practice>Q 28

What are the major features of embryonic development at various months of pregnancy?