Biology
(i) Draw a well labelled diagram to show the anaphase stage of mitosis in a plant cell having four chromosomes.
(ii) State any two harmful effects of acid rain.
(iii) Expand the following biological abbreviations :
- NADP
- ACT
Answer
(i) Diagram showing the anaphase stage of mitosis in a plant cell having four chromosomes is shown below:
(ii) Two harmful effects of acid rain are:
- Damage to vegetation by pollution of the soil.
- Fish and other aquatic organisms are harmed due to increased acidity of water in lakes and rivers.
(iii) The full forms are mentioned below:
- NADP — Nicotinamide Adenine Dinucleotide Phosphate
- ACT — Adrenocorticotropin.
Related Questions
The figure given below shows the epidermal cells of an onion bulb. This cell was then transferred to a drop of sugar solution.
(i) Draw a well labelled diagram of the epidermal cell as it would appear after immersion in a strong sugar solution.
(ii) What scientific term is used for the changes as shown in (i) above ?
(iii) What should be done to restore the cell back to its original condition ?
(iv) Give the scientific term for the recovery of the cell as a result of the step taken in (iii) above.
(v) Define the term osmosis.
(i) List any two major activities of the Red Cross.
(ii) Write any two major reasons for the population explosion in the world.
(iii) Write the names of four nitrogenous bases in a DNA molecule.
Give biological reasons for the following :
The hand automatically shows the direction to turn a cycle without thinking.
Briefly explain the following terms:
(i) Genes.
(ii) Cytokinesis in plant cells.
(iii) Guttation.
(iv) Diabetes insipidus.
(v) Disinfectants.