NCERT Class-9 Science Solutions: Chapter 5-The Fundamental Unit Of Life Part 8

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Question 49:

Which kind of plastid is more common in

  1. Roots of the plant

  2. Leaves of the plant

  3. Flowers and fruits

Answer:

  1. Leucoplast

  2. Chloroplast

  3. Chromoplast

Question 50:

Why do plant cells possess large sized vacuole?

Answer:

Vacuoles not only store many important substances, they also contain cell sap that give turgidity to cell.

Question 51:

How are chromatin, chromatid and chromosomes related to each other?

Answer:

Chromosomes are made up of chromatids and chromatids are made up of chromatin

Question 52:

What are the consequences of the following conditions?

  1. A cell containing higher water concentration than the surrounding medium

  2. A cell having low water concentration than the surrounding medium.

  3. A cell having equal water concentration to its surrounding medium.

Answer:

  1. Exosmosis

  2. Endosmosis

  3. No effect

Long Answer Questions

Question 53:

Draw a plant cell and label the parts which

  1. Determines the function and development of the cell

  2. Packages materials coming from the endoplasmic reticulum

  3. Provides resistance to microbes to withstand hypotonic external media without bursting

  4. Is site for many biochemical reactions necessary to sustain life?

  5. Is a fluid contained inside the nucleus

Answer:

  1. Nucleus

  2. Golgi apparatus

  3. Cell wall

  4. Cytoplasm

  5. Nucleoplasm.

Diagram of the plant cell can be drawn and label it with parts mentioned above

Image of plant cell

Image of Plant Cell

Image of plant cell