Biology
Briefly explain the following terms.
(i) Monohybrid cross
(ii) Biomedical waste
(iii) Innate immunity
(iv) Diapedesis
(v) Hormones
Genetics
ICSE 2014
1 Like
Answer
(i) A cross between two parents taking the alternative traits of one single character. For example, a cross between tall and dwarf pea plants.
(ii) Biomedical waste refers to the waste from medical services such as needles, syringes, dirty dressings, unused discarded medicinal tablets and powders, used surgical instruments, etc.
(iii) Immunity which is by birth, i.e., acquired from parents, is called Innate immunity.
(iv) The process in which WBCs (specially monocytes and neutrophils) produce pseudopodia and migrate through the walls of the blood vessels into the tissues to fight against disease causing germs is termed as Diapedesis.
(v) Hormones are secretions from some glandular part of the body, that is poured directly into blood and that acts on the target organs or cells of the same individual, bringing about coordination between distant parts of the body.
Answered By
1 Like
Related Questions
(i) Name the disease for which the following types of vaccines are given:
- Salk's vaccine
- BCG
(ii) Give one example of each of the following:
- A water pollutant
- An aquatic plant used in the lab to demonstrate O2 liberation during photosynthesis
- An antibiotic
- A nitrogenous base in DNA
(iii) Expand the following biological abbreviations:
- ATP
- TSH
- DPT
- DNA
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) State any two harmful effects of noise pollution on human health.
(ii) Categorize the following activities as per the functions of the Red Cross Society and the WHO:
- To suggest quarantine measures to prevent spread of disease.
- Humanitarian services to victim of war.
- To educate people in accident prevention.
- To promote projects for research on disease.
(iii) Write any two major reasons for the population explosion in India.
(iv) State Mendel's Law of segregation
Give technical terms for the following:
(i) A method of contraception in which the sperm duct is cut and ligated.
(ii) Statistical study of human population.
(iii) The protective covering of the heart.
(iv) A sudden heritable change in the gene.
(v) Repeated units of DNA molecule.
(vi) The fluid portion of blood.
(vii) The nerve that transmits impulses from the ear to the brain.
(viii) Group of hormones which influence other endocrine glands to produce hormones.
(ix) Thin walled sac of skin which covers the testes.
(x) The permanent stoppage of the menstrual cycle in a woman aged 50 years.