HSC Science (General) इयत्ता १२ वी - Maharashtra State Board Important Questions for Biology

Why is ABA known as antitranspirant?

A gardener wants to give bushy appearance to plants in our college campus.

1. What should he do to achieve the same? 
2. Which property of phytohormones he must be aware of?

Write the name of______

1. First hormone discovered in plants.
2. Biological name of fungus from which Gibberellins were first isolated. 
3. The name given to the first cytokinin by Skoog and Miller.

Write the name of Hormone that can overcome the requirement of vernalization.

Write full form of  2,4-D

Describe physiological effects and applications of gaseous hormones in plants.

Write the name of Gaseous growth hormone known to you.

Write the name of Standard bioassay method for auxins.

Write full form of IBA

Write full form of NAA

With the help of a suitable diagram, describe the conducting system of the human heart.

Explain with the help of a suitable diagram conducting system of human heart.

Sketch and label T.S. of human artery.

Give any three differences between an artery and a vein

Find out the example in which due to absence of respiratory pigment transport of respiratory gases does not takes place.

Define Bohr effect and Haldane effect.

Draw diagram of conducting system of human heart. Label SA node and bundle of His.

Write a note on Hering-Breuer reflex.

Draw the chart of double circulation and label A, B, C and D.

Define hypertension. Explain coronary artery disease and angina pectoris.