HSC Science (General) १२ वीं कक्षा - Maharashtra State Board Question Bank Solutions

Choose the correct alternative.

Which of the following animals do not have closed circulation?

Choose the correct alternative.

Diapedesis is performed by ______.

Choose the correct alternative.

Which of the following is without a nucleus?

Choose the correct alternative.

Cockroach shows which kind of circulatory system?

Choose the correct alternative.

Diapedesis can be seen in _________ cell.

Opening of inferior vena cava is guarded by _______.

Choose the correct alternative.

The fluid seen in the intercellular spaces in human is _________

Match the Respiratory surface to the organism in which it is found.

Very short answer question.

Why is respiration in insect called direct respiration?

Short answer question.

Identify the incorrect statement and correct it,

a. A respiratory surface area should have a large surface area.

b. A respiratory surface area should be kept dry.

c. A respiratory surface area should be thin, maybe 1mm or less.

Diffused type of nervous system is seen in ______.

Wheat -Atlas 66 has high contents of ______.

The technique which involves addition or deletion of genes is ______.

ECoRI is obtained from ______.

The enzyme restriction endonuclease ______.

Ti plasmid being used for introducing genes in plants obtained from ______.

Polymerase chain reaction is most useful in ______.

What is plasmid?

What is Palindromic sequence?

Alu-I is obtained from which organism?