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Category: Biology

Draw a labelled diagram of the reproductive organs of an earthworm.

Class 11 Biology
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What are the following and where do you find them in animal body? (a) Chondrocytes (b) Axons. (c) Ciliated epithelium

Class 11 Biology
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Answer in one word or one line. (i) Give the common name of Periplaneta americana. (ii) How many spermatheca are found in earthworms? (iii) What is the position of ovaries in a cockroach? (iv) How many segments are present in the abdomen of cockroaches? (v) Where do you find Malpighian tubules?

Class 11 Biology
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What is periderm? How does periderm formation take place in the dicot stems?

Class 11 Biology
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How is the study of plant anatomy useful to us?

Class 11 Biology
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Name the three basic tissue systems in the flowering plants. Give the tissue names under each system.

Class 11 Biology
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What is stomatal apparatus? Explain the structure of stomata with a labelled diagram.

Class 11 Biology
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Why are xylem and phloem called complex tissues?

Class 11 Biology
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The transverse section of a plant material shows the following anatomical features – (a) the vascular bundles are conjoint, scattered and surrounded by a sclerenchymatous bundle sheath, (b) phloem parenchyma is absent. What will you identify it as?

Class 11 Biology
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Cut a transverse section of the young stem of a plant from your school garden and observe it under the microscope. How would you ascertain whether it is a monocot stem or a dicot stem ? Give reasons.

Class 11 Biology
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Draw illustrations to bring out the anatomical difference between (a) Monocot root and dicot root (b) Monocot stem and dicot stem.

Class 11 Biology
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Explain the process of secondary growth in the stems of woody angiosperms with the help of schematic diagrams. What is its significance?

Class 11 Biology
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