1st Terminal Examination, 2010-11
Class: XI                                                             Time: 3 hrs
Subject: Biology                                                 Marks: 70
Section-A (1X8=8)
  1. Give the scientific name of mango.
  2. Name two phyla of animals that show radial symmetry.
  3. Both gymnosperms and angiosperms bear seeds, then why are they classified separately?
  4. Why are animals of phylum Platyhelminthes known as flatworms?
  5. What is valvate aestivation?
  6. What is pulvinus?
  7. Name the two types of cells that generally constitutes mesophyll in a dicot plant.
  8. Write the key difference between striated muscle and non-striated muscle.

SECTION-B (2X10=20)
  9. What is binomial nomenclature? Give an example and explain.
  10.   Mention four distinguishing features of kingdom monera.
  11.   How does isogamous reproduction differ from anisogamous reproduction?
  12.   What is meant by internal fertilization? Give two examples of animals that show internal fertilization.
  13.   Show diagrammatically an epigynous flower.
        Draw a longitudinal section of a mango fruit. Label three parts in its wall. What type of fruit is it?
  14. Wrire the floral formula of an acinomorphic, bisexual, hypogynous flower with five united sepals, five free stamens and two united carpels with superior ovary and axile placentation.
  15.   Differentiate between fibrous root and adventitious root.
  16.   Cut the transverse section of young stem of a plant from your school garden and observe it under microscope. How would you ascertain whether it is a monocot stem or a dicot stem?
  17.   What are bulliform cells? What is their function?
  18.   Mention the scientific name of earthworm. What is the function of prostomium in earthworm?

SECTION-C (3 X 9 = 27)
  19.   What is a museum? How are the specimens preserved here?
  20.   Draw a...