Recent questions tagged sec-d

Describe briefly the four major groups of protozoa. The four groups of Protozoa are classified based on their locomotory organs.

asked Jul 18, 2019 by swapnarajan1982

2 answers

Discuss how classification systems have undergone several changes over a period of time. Since the dawn of civilization, many attempts have been made to classify organisms.

asked Jul 18, 2019 by swapnarajan1982

2 answers

Algae are known to reproduce asexually by variety of spores under different environmental conditions. Name these spores and the conditions in which they are produced.

asked Jul 18, 2019 by swapnarajan1982

1 answer

Metabolism is defining feature of all living organisms without exception. Isolated metabolic reactions in vitro are not living things but surely living reactions. Comment.

asked Jul 9, 2019 by swapnarajan1982

1 answer

Define a taxon. What is meant by a taxonomic hierarchy? Give a diagram from the lowest to highest category for a plant and an animal. What happens to the number of individuals and number of shared characters as we go up the taxonomical hierarchy?

asked Jul 9, 2019 by swapnarajan1982

1 answer

What are taxonomical aids? Give the importance of herbaria and museums. How are botanical gardens and zoological parks useful in conserving biodiversity?

asked Jul 9, 2019 by swapnarajan1982

1 answer

Brassica campestris Linn

asked Jul 2, 2019 by swapnarajan1982

1 answer

A scientist has come across a plant which he feels is a new species. How will he go about its identification, classification and nomenclature?

asked Jul 2, 2019 by swapnarajan1982

1 answer

What is meant by living? Give any four defining features of life forms.

asked Jul 2, 2019 by swapnarajan1982

1 answer

asked Apr 30, 2019 by priyanka.clay6

1 answer

Expand: AIDS,VD, IUT, AI, IVF, STD, MTP, IUD, ZIFT, GIFT, ART, ICSI, PID

asked Apr 24, 2019 by priyanka.clay6

1 answer

What is STD? List out the various STD's. How is it transmitted? What are its symptoms? What are the complications the STD could lead to?

asked Apr 24, 2019 by priyanka.clay6

1 answer

How do the natural, barriers, IUD's, Oral pills and Surgical methods help in Contraception? Explain.

asked Apr 24, 2019 by priyanka.clay6

1 answer

Briefly explain the various reproductive technologies to assist an infertile couple to have children.

asked Apr 24, 2019 by priyanka.clay6

1 answer

Two plants (snapdragon) with red flowers and white flowers are crossed and the following results are shown:

asked Apr 24, 2019 by priyanka.clay6

1 answer

Describe the nature of inheritance of the ABO blood group in humans. In which ways does this inheritance differ from that of height of the plant in garden pea?

asked Apr 24, 2019 by priyanka.clay6

1 answer

A dihybrid heterozygous round, yellow seeded garden pea was crossed with a double recessive plant. i. What type of cross is this ? ii. Work out the genotype and phenotype of the progeny. iii. What principle of Mendel is illustrated by it ?

asked Apr 24, 2019 by priyanka.clay6

1 answer

Define adaptation. What is the adaptation shown by - a, whales, b, kangaroo rat, c, polar bear. Why do cold regions have no small animals?

asked Apr 23, 2019 by priyanka.clay6

1 answer

What factors contribute to growth in population. In what way does logistic growth differ from exponential growth?

asked Apr 23, 2019 by priyanka.clay6

1 answer

Define population and population density. How is it estimated? What are the attributes that determine the population characteristics?

asked Apr 23, 2019 by priyanka.clay6

1 answer

Give examples of biochemical adaption and behavioural adaptations shown by organisms.

asked Apr 23, 2019 by priyanka.clay6

1 answer

Give examples of adaptation to desert condition shown by organisms.

asked Apr 23, 2019 by priyanka.clay6

1 answer

The immune system of a person is supressed. He was found positive for a pathogen in the diagnostic test ELISA. a. Name the disease, the patient is suffering from. b. Which pathogen is identified by ELISA test? c. Which cells of the body are attacked by the pathogen ? d. Suggest preventive measure of the infection.

asked Apr 22, 2019 by priyanka.clay6

1 answer

The pathogen of a disease depends on RBCs of human for growth and reproduction. The person with this pathogen suffers with chill and high fever. a. Identify the disease. b. Name the pathogen. c. What is the cause of fever ? d. Represent the life cycle of the pathogen diagrammatically.

asked Apr 22, 2019 by priyanka.clay6

1 answer

Answer the following with respect to Cancer. a. How does a cancerous cell differ from a normal cell. b. Benign tumour is less dangerous than malignant tumour. Why ? c. Describe causes of cancer. d. Mention two methods of treatment of the disease.

asked Apr 22, 2019 by priyanka.clay6

1 answer

Describe the asexual and sexual phases of life cycle of Plasmodium that causes malaria in humans.

asked Apr 22, 2019 by priyanka.clay6

1 answer

Malarial parasite 'Plasmodium' completes its life cycle in two hosts. Draw its complete life cycle and explain various stages it follows throughout its life.

asked Apr 22, 2019 by priyanka.clay6

1 answer

How did Meselson and Stahl experimentally prove that DNA replication is semi conservative? Explain

asked Apr 19, 2019 by priyanka.clay6

1 answer

(a) Identify the structure shown above.

asked Apr 19, 2019 by priyanka.clay6

1 answer

(a) Differentiate between repetitive and satellite DNA. (b) How can satellite DNA be isolated? Explain. (c) List two forensic applications of this technology.

asked Apr 19, 2019 by priyanka.clay6

1 answer

(a) Describe the process of synthesis of fully functional mRNA in a eukaryotic cell. (b) How is this process of mRNA synthesis different from that in prokaryotes?

asked Apr 19, 2019 by priyanka.clay6

1 answer

Answer the following questions based on Meselson and Stahl's experiment : a. Write the name of the chemical substance used as a source of nitrogen in the experiment by them. b. Why did the scientists synthesize the light and the heavy DNA molecules in the organism in the experiment? c. How did the scientists make it possible to distinguish the heavy DNA molecule from the light DNA molecule? Explain. d. Write the conclusion the scientists arrived at, after completing the experiment.

asked Apr 19, 2019 by priyanka.clay6

1 answer

Explain Mac Leod, McCarty and Avery`s work that followed Griffith`s experiment. State the conclusion they arrived at.

asked Apr 19, 2019 by priyanka.clay6

1 answer

Describe Frederick Griffith`s experiment on Streptococcus pneumoniae. Discuss the conclusion he arrived at.

asked Apr 19, 2019 by priyanka.clay6

1 answer

(a)Write the specific features of the genetic code AUG. (b) Codes can be universal and degenerate. Write about them giving one example of each. (c) What is aminoacylation of the tRNA.

asked Apr 19, 2019 by priyanka.clay6

1 answer

(a)Write the conclusion drawn by Griffith at the end of his experiment with Streptococcus pneumoniae. (b) How did Avery, C. MacLeod and M.McCarty prove that DNA was the genetic material? Explain.

asked Apr 19, 2019 by priyanka.clay6

1 answer

Explain the process of protein synthesis from processed m-RNA.

asked Apr 19, 2019 by priyanka.clay6

1 answer

What is the difference between bio fertilizers and chemical fertilizers?

asked Apr 17, 2019 by priyanka.clay6

1 answer

What is the difference between primary and secondary treatment of sewage.

asked Apr 17, 2019 by priyanka.clay6

1 answer