HSC Science (General) ११ वीं कक्षा - Maharashtra State Board Question Bank Solutions

Explain the following in short:

What is mesentron?

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Tubular secretion does not take place in ______.

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Effective filtration pressure was calculated to be 20 mmHg; where glomerular hydrostatic pressure was 70 mm of Hg. Which other pressure is affecting the filtration process? How much is it?

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What kind of contraction occurs in your neck muscles while you are reading your class assignment?

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There were two cut logs of wood lying in the campus. One had growth rings and other didn’t. Teacher said it is due to differences in their pattern of growth which is dependent on the season. How?

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While on the trip to Kashmir, Pintoo observed that cut portions of large trees show distinct rings, which he never found in Maharashtra. Why is so?

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Student found a wooden stopper in lab. He was told by an old lab attendant that it is there for many years. He kept thinking how it did not rot?

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Non-cyclic photophorylation differs from cyclic photophosphorylation in that former.

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Describe the light-dependent steps of photosynthesis. How are they linked to the dark reactions?

Is there something wrong with following the schematic presentation? If yes, correct it so that photosynthesis will be operated.

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Small Intestine is very long and coiled. Even if we jump and run, why it does not get twisted? What can happen if it gets twisted?

Write down the explanation.

Explain the structure of tooth.

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Explain why human dentition is considered as thecodont, diphydont and heterodont.

Observe the diagram. This is the histological structure of the stomach. Identify and comment on the significance of the layer marked by an arrow.

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Anitaji needs to micturate several times and feels very thirsty. This is an indication of change in permeability of certain part of nephron. Which is this part?

Write a short note on role of calcium ions in contraction and relaxation of muscles.

Enzymes can react with acidic or basic substances due to their ______ nature.

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Calvin cycle consists of three phases, what are they?

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Explain the significance of Calvin cycle.

Write the explanation in your words.

Nitya has been admitted to hospital after heavy blood loss. Till proper treatment could be given; how did Nitya's body must have tackled the situation?