Question
Draw a labeled diagram of sperm.
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Briefly explain how the rate of transpiration is affected by
Intensity of light
Intensity of light
Given below are diagrams of plant cells as seen under the microscope after having been placed in two different solutions :
(i) What is the technical term for the condition of the following?
(a) Cell A
(b) Cell B
(ii) From the solutions given in brackets (water, strong sugar solution, $1 \%$ salt solution) name the solution into which :
(a) Cell A
(b) Cell B, was placed before being viewed under the microscope,
(iii) Under what conditions in the soil will the root hair cell resemble:
(a) Cell A
(b) Cell $B$
→(i) What is the technical term for the condition of the following?
(a) Cell A
(b) Cell B
(ii) From the solutions given in brackets (water, strong sugar solution, $1 \%$ salt solution) name the solution into which :
(a) Cell A
(b) Cell B, was placed before being viewed under the microscope,
(iii) Under what conditions in the soil will the root hair cell resemble:
(a) Cell A
(b) Cell $B$
The given diagram represents a nephron and its blood supply. Study the diagram and answer the following questions:
(i) Label parts 1, 2, 3 and 4.
(ii) State the reason for the high hydrostatic pressure in the glomerulus.
(iii) Name the blood vessel which contains the least amount of urea in this diagram.
(iv) Name the two main stages of urine formation.
(v) Name the part of the nephron which lies in the renal medulla.
(i) Label parts 1, 2, 3 and 4.
(ii) State the reason for the high hydrostatic pressure in the glomerulus.
(iii) Name the blood vessel which contains the least amount of urea in this diagram.
(iv) Name the two main stages of urine formation.
(v) Name the part of the nephron which lies in the renal medulla.
A 50-year-old man, Mr. Johnson, is experiencing frequent urination, especially at night, along with fatigue and swelling in his ankles. Upon examination, his doctor suspects a possible issue with his excretory system. Mr. Johnson is concerned about his condition and seeks clarification on how the excretory system fiunctions and its role in maintaining overall health.
(i) What are the organs involved in excretion in human body and the substances excreted by the excretory system?
(ii) How does the excretory system regulate the balance of water and electrolytes in the body?
(iii) Discuss the role of the kidneys in excretion.
(i) What are the organs involved in excretion in human body and the substances excreted by the excretory system?
(ii) How does the excretory system regulate the balance of water and electrolytes in the body?
(iii) Discuss the role of the kidneys in excretion.
Which glands are responsible for the following disease?
(i) Goitre (ii) Diabetes mellitus (iii) Gigantism
(iv) Diabetes insipidus (v) Cretinism (vi) Exophthalmic goiter
(i) Goitre (ii) Diabetes mellitus (iii) Gigantism
(iv) Diabetes insipidus (v) Cretinism (vi) Exophthalmic goiter
Explain the mechanism of stomata?
The table below is designed to indicate the transport of certain substance in our body. Fill in the
blanks with suitable answers.
blanks with suitable answers.
| Substance | From | To |
| Lungs | Whole body | |
| Carbon dioxide | ||
| Urea | ||
| Digested carbohydrates | Intestines | |
| Target organs |
A candidate studied the importance of certain factors in photosynthesis. He took a potted plant and kept in the dark for over 24 hours. In the early hours of the next morning, he covered one of the leaves with black paper in the centre only. Then he placed the plant in sunlight for a few hours and tested the leaf which was covered with black paper for starch.
Describe step by step, how the candidate proceeded to test the leaf for the presence of starch?
Describe step by step, how the candidate proceeded to test the leaf for the presence of starch?
Given below is the diagram showing metaphase stage of the cell cycle. Read the information and fill in the blanks:
Metaphase is a stage during the process of cell division. It occurs during both mitosis and meiosis.
During metaphase, chromosomes align along the ________(i)________. The metaphase plate is an imaginary plane equidistant from the ________(ii)________. Spindle fibers attach to the ________(iii)________ of chromosomes, Spindle fibres arises from centrioles that are present on the ________(iv)________ poles. Metaphase ensures each daughter cell receives an identical set of ________(v)________.
Metaphase is a stage during the process of cell division. It occurs during both mitosis and meiosis.
During metaphase, chromosomes align along the ________(i)________. The metaphase plate is an imaginary plane equidistant from the ________(ii)________. Spindle fibers attach to the ________(iii)________ of chromosomes, Spindle fibres arises from centrioles that are present on the ________(iv)________ poles. Metaphase ensures each daughter cell receives an identical set of ________(v)________.