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

Assertion (A): The foetus respires but does not breathe.

Reason (R): The maternal blood supplies oxygen to the foetus through placenta.

Name the following:

Two hormones secreted from placenta.

List the substances which the foetus receives from the mother through placenta.

How are carbon dioxide and urea, excreted by the foetus, removed?

Write one sentence using the following term pertaining to reproduction in humans.

Placenta

Does the foetus inside the mother's uterus breathe?

Placenta produces certain hormones.

Amniotic fluid serves to provide oxygen to the foetus.

Heart and blood vessels have been formed by the end of five weeks of pregnancy.

Mother's blood flows into the foetus through placenta.

Which of the following cannot pass readily through the placenta to the foetus?

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

Foetus.

1. Where is it contained?
2. How does it differ from embryo?

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

Morula.

1. What is this stage?
2. Name the stage which comes next to it?

Write the specific location of the following:

Placenta

Distinguish between the following pair:

Placenta and umbilical cord

What do you mean by identical and fraternal twins?

Read the explanation given below and name the structure:

A cell formed by the fusion of gametes.

State the difference between Micturition and Parturition.

Write one sentence using the following term pertaining to reproduction in humans.

Gestation

Write one sentence using the following term pertaining to reproduction in humans.

280 days