Biology
Differentiate between the following pairs on the basis of what is indicated in the brackets.
(i) Leaf and Liver [form in which glucose is stored]
(ii) ATP and AIDS [expand the abbreviations]
(iii) Testosterone and Oestrogen [organ which secretes]
(iv) Ureter and Urethra [function]
(v) Hypotonic solution and Hypertonic solution [condition of a plant cell when placed in them]
Answer
(i) Leaf — Starch, Liver — Glycogen.
(ii) ATP — Adenosine Triphosphate, AIDS — Acquired Immune Deficiency Syndrome.
(iii) Testosterone — Testis, Oestrogen — Ovary
(iv) Ureter — Transfers urine from the kidney to the urinary bladder, Urethra — expulsion of urine from the urinary bladder to outside of the body.
(v) Hypotonic — Plant cell becomes Turgid, Hypertonic — Plant cell becomes Flaccid .
Related Questions
Give appropriate biological or technical terms for the following:
(i) Process of maintaining water and salt balance in the blood.
(ii) Hormones which regulate the secretion of other endocrine glands.
(iii) Movement of molecules of a substance from their higher concentration to lower concentration when they are in direct contact.
(iv) The condition in which a pair of chromosomes carry similar alleles of a particular character.
(v) The complex consisting of a DNA strand and a core of histones.
(vi) The onset of menstruation in a young girl.
(vii) Squeezing out of white blood cells from the capillaries into the surrounding tissues.
(viii) The fluid which surrounds the foetus.
(ix) The relaxation phase of the heart.
(x) The difference between the birth rate and the death rate.
The diagram given below is that of a structure present in a human kidney. Study the same and answer the questions that follow:
(i) Name the structure represented in the diagram.
(ii) What is the liquid entering part '1' called? Name two substances present in this liquid that are reabsorbed in the tubule.
(iii) What is the fluid that comes to part '2' called? Name the main nitrogenous waste in it.
(iv) Mention the three main steps involved in the formation of the fluid mentioned in (iii) above.
(v) Name the substance which may be present in the fluid in part '2' if a person suffers from Diabetes mellitus.
Given below is a diagram of a human blood smear. Study the diagram and answer the questions that follow:
(i) Name the components numbered '1' to '4'.
(ii) Mention two structural differences between the parts '1' and '2'.
(iii) Name the soluble protein found in part '4' which forms insoluble threads during clotting of blood.
(iv) What is the average lifespan of the component numbered '1'?
(v) Component numbered '1' do not have certain organelles but are very efficient in their function. Explain.
Give biological explanations for the following:
(i) Education is very important for population control.
(ii) The placenta is an important structure for the development of a foetus.
(iii) All the food chains begin with green plants.
(iv) Plants growing in fertilized soil are often found to wilt if the soil is not adequately watered.
(v) We should not put sharp objects into our ears.