Explain the following terms:
Mutation
Mutation is a sudden inheritable change in one or more genes or in the number of or in the structure of chromosomes which causes changes in certain traits.
State whether the following statements are true or false. If false, write the correct statement by changing the incorrect word/words only.
A.
The process of fusion of the sperm nucleus and the egg nucleus is termed implantation.
Given below is a set of terms arranged in a logical sequence, representing a process or a function. Of these, one term is incorrect. Identify the incorrect term and replace it with the correct term. One has been done for you as an example.
E.g. Pollen grain → Exine → Staminal tube →Male gametes → Micropyle
Incorrect term – Staminal tube.
Correct term – Pollen tube
Seminiferous tubule → Sperm → Sperm duct → Accessory glands → Semen →Ureter
Given below is a set of terms arranged in a logical sequence, representing a process or a function. Of these, one term is incorrect. Identify the incorrect term and replace it with the correct term. One has been done for you as an example.
E.g. Pollen grain → Exine → Staminal tube →Male gametes → Micropyle
Incorrect term – Staminal tube.
Correct term – Pollen tube
Soil water → Root hair → Cells of cortex → Epidermis → Xylem
Given below is a set of terms arranged in a logical sequence, representing a process or a function. Of these, one term is incorrect. Identify the incorrect term and replace it with the correct term. One has been done for you as an example.
E.g. Pollen grain → Exine → Staminal tube →Male gametes → Micropyle
Incorrect term – Staminal tube.
Correct term – Pollen tube
Pupil → Eye lens → Vitreous humour → Fovea → Auditory nerve
Given below is a set of terms arranged in a logical sequence, representing a process or a function. Of these, one term is incorrect. Identify the incorrect term and replace it with the correct term. One has been done for you as an example.
E.g. Pollen grain → Exine → Staminal tube →Male gametes → Micropyle
Incorrect term – Staminal tube.
Correct term – Pollen tube
Oxygen → Stoma → Respiratory cavity → Mesophyll cells → Oxidation of glucose →2 ATP