Download biology xi - Dehradun Public School

DEHRADUN PUBLIC SCHOOL
I TERM ASSIGNMENT (2016-17)
SUBJECT- BIOLOGY (044)
CLASS -XI
Chapter -1 :The Living World
Q.1. Name the four processes that are basic to taxonomy.
Q.2. Write the biological name of Mango and Man.
Q.3. Define a taxon. Give some examples of taxa at different hierarchical levels.
Q.4. Write a short account on herbarium as a taxonomic aid.
Chapter -2: Biological Classification
Q.5. Mention the two places where methanogens are present.
Q.6. What is the nature of cell wall in diatoms?
Q.7. How are viroids different from viruses?
Q.8. Describe the three common steps in the sexual reproduction of Fungi.
Q.9. Who proposed the five kingdom classification? Name the five kingdoms.
Q.10.Describe briefly the four major groups of Protozoa.
Chapter 3: Plant Kingdom
Q.11.Why the bryophytes are called “Amphibians of plant kingdom”?
Q.12.Mention the component cells of an embryo sac of angiosperms.
Q.13.Both gymnosperms and angiosperms bear seeds, but why are they classified separately?
Q.14.Name the type of fertilization, which is unique to angiosperms. Describe briefly.
Chapter 4:-Animal Kingdom
Q.15.When is the coelom said to be true coelom?
Q.16.What is the role of radula in Mollusca?
Q.17.Name the reptile that has four chambered heart.
Q.18.“All vertebrates are chordates, but all chordates are not vertebrates.”Justify the statement.
Q.19.Differentiate between nerve cord and notochord.
Q.20.Give an example of each of the following ;a)oviparous animal with mammary gland
b)an organ which regulates buoyancy
c)a viviparous animal
Q.21.If you are given a specimen. What steps would you follow to classify it?
Chapter 5:Morphology of Flowering Plants
Q.22.Give two examples of roots that develop from different parts of an angiospermic plant other
than the radical.
Q.23.What is a parthenocarpic fruit?
Q.24.How the pinnately compound leaf differs from a palmately compound leaf?
Q.25.Differentiate between apocarpous ovary and syncarpous ovary.
Q.26.Flower is a modified shoot .Justify
Q.27.Which type of venation do you see in dicots?
Q.28.Describe the various types of placentation found in flowering plants.
Chapter 6:Anatomy of Flowering Plants
Q.29.Name the group of plants where phloem parenchyma is absent.
Q.30.What are meristems? Name the various type of meristems found in plants. State their
functions and location.
Q.31.Which tissue of the leaf contains chloroplast?
Q.32.How the endarch and exarch conditions differ anatomically?
Q.33.Write the functions of companion cells.
Q.34.Where are casparain strips found?
Q.35.What is stomatal apparatus? Explain the structure of stomata with a labeled diagram.
Q.36.Describe the internal structure of dorsiventral leaf with the help of labeled diagram.
Chapter- 7:-Structural Organisation in Animals
Q.37. What is the function of ciliated epithelium? Where do we find this epithelium?
Q.38.How many segments are found in the abdomen of a cockroach?
Q.39.Differentiate between adipose and blood tissue.
Q.40.Differentiate between cardiac and striated muscles.
Q.41.Draw a labeled diagram of alimentary canal of a cockroach.
Q.42.Where are RBCs formed?
Chapter-8:Cell:The Unit of Life
Q.43.Name the smallest and the longest cell in a human body.
Q.44.Expand PPLO.
Q.45.“Both lysosome and vacuoles are endomembranous structures, yet they differ in terms of
their functions.Comment.”
Q.46.Who proposed the fluid mosaic model of plasma membrane? Describe it with the help of a
labelled diagram.
Chapter -9:-Biomolecules
Q.47.Why are the enzymes specific for a substrate?
Q.48.Who proposed the model of double helical structure of DNA? Why are the strands of DNA
described as antiparallel?
Q.49.What is meant by tertiary structure of proteins?
Q.50.Explain the structure of DNA. Write three major differences between DNA and RNA?
Q.51.Enlist the important properties of enzymes.
Chapter-10:Cell cycle and Cell division
Q.52.What is the significance of meiosis?
Q.53.What are chiasmata? What is their significance?
Q.54.Define cytokinesis. How it is accomplished in animal cells?
Q.55.List the main differences between mitosis and meiosis.
Chapter-11:Transport in Plants
Q.56.Differentiate between Diffusion and osmosis.
Q.57.Explain mass flow hypothesis.
Q.58.What role does root pressure play in water movement in plants?
Q.59.Explain why xylem transport is unidirectional and phloem transport is bidirectional?
Q.60.What causes the opening and closing of guard cells of stomata during transpiration?