(English Medium) ICSE Class 10 - CISCE Question Bank Solutions for Biology

Given below is the name of certain stage/substance related to reproduction and found in human body. Answer the questions related to it.

Placenta

1. What are the two sources that form placenta?
2. Name any two main substances which pass from foetus to mother through placenta.
3. Name any two hormones it produces.

Given below is the name of certain stage/substance related to reproduction and found in human body. Answer the questions related to it.

Implantation.

1. The development stage that undergoes this process.
2. The approximate time after fertilisation, when it occurs.

Differentiate between: 

Follicle and corpus luteum 

Differentiate between:  

Impotency and sterility 

Differentiate between: 

Amnion and allantois 

Name and describe very briefly, the stages in the development of human embryo.

Describe the functions of Amnion 

Describe the functions of placenta 

The diagram given alongside is that of a developing human foetus in the womb. Study the same and answer the questions that follows:

Name the parts ‘1’ to ‘5’ indicated by guidelines

Name the following: 

The structure which connects the placenta and the foetus.

 Correct and rewrite the statements by changing the biological term that is underlined for the statement: 
The protective sac which develops around the developing embryo is called the Pericardium. 

What is Placenta?

How is Placenta formed?  What are its functions?

Mention three functions of the placenta.

The circulatory system of the fetus and that of the mother are never connected directly. What are the advantages?

What changes occur at the time of birth?

Describe briefly the ways how a mammalian embryo is protected

Describe briefly the ways how a mammalian embryo is nourished

Describe briefly the ways how a mammalian embryo is respires

Give Reasons

The full-grown human embryo respires but does not breathe.