The structure which connects the placenta and the foetus.

The organization which procures and supplies blood during an emergency

How can deepening of the river bed help in preventing soil erosion?

Given below is a diagram representing a stage during the mitotic cell division. Study the diagram and answer the following questions:

1. Identify the stage by giving a suitable reason.
2. Is it a plant or
...

In Mendel’s experiments, tall pea plants (T) are dominant over dwarf pea plants (t).

1. What is the phenotype and genotype of the F₁ generation if a homozygous tall plant is crossed with a homozygous
...

Name the Presiding officer of the Lok Sabha.

A potted plant with variegated leaves was taken in order to prove a factor necessary for photosynthesis. The potted plant was kept in the dark for 24 hours and then placed in bright sunlight for a...

How do trees in the Tropical desert forests adapt themselves to the dry climate?

Using a graph paper draw a histogram for the given distribution showing the number of runs scored by 50 batsmen. Estimate the mode of the data:

How long can the Rajya Sabha retain the money bill sent by the Lok Sabha?

Answer the following questions based on the extraction of aluminium from alumina by Hall-Heroult’s Process:

1. What is the function of cryolite used along with alumina as the electrolyte?
2. Why is powdered
...

In the given figure AC is a tangent to the circle with centre O. If ∠ADB = 55^°, find x and y. Give reasons for your answers.

"Roadways are an important means of transport in India." Give two reasons to justify the statement.

Using properties of proportion, solve for x. Given that x is positive:

A hydrocarbon which is a greenhouse gas is:

A. Acetylene

B. Ethylene

C. Ethane

D. Methane

The horrors of the two World Wars, led to the formation of the United Nations Organisation, while the formation of the Non-Aligned Movement followed later. In this context, Explain any four factors that...