Biology 1st Paper CQ-Jessore Board-2017

What is crossing over?

Why viruses are called acellular?

Differentiate between $\mathrm{M}$ and $\mathrm{N}$ mentioned in the stem.

Analyze the importance of part ' $\mathrm{O}$ ' mentioned in the stem in the living world.

What are nucleotides?

What lysosomes are called self-destructive organelles (suicide bag)?

Write the chemical structure of the component which provides sweet in sherbet.

Analyze the bad effects of the component in human body which is used to make delicious foods mentioned in the stem.

What is biome?

Discuss the importance and necessity of parthenocarpy.

The animal of the figure ' $B$ ' in the stem belongs to which zoogeographical region? Describe the characteristics of the forest particular to that region. Also discuss the properties of the animals living in that region.

'The figure ' $A$ ' of the stem has diversified reproduction abilities which help in afforestation"- justify this statement.

What is floral formula?

What do you understand by coralloid roots?

Write down the necessary measures that can be taken to prevent the first disease as mentioned in the stem. Also, write down the causes of the disease.

If the second disease of the stem turns to an epidemic, then what might be consequences on our day to day life? Explain the possible threats and outcomes.

What is isogamous?

What do you mean by parasites?

Write down the identifying characteristics for the plant mentioned in the later part of the stem.

Describe the importance of the first plant mentioned in the stem in soil erosion, livestock farming, in food supply and in industries.