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Sudha took a small amount of an unknown food item in a test tube. Then, she added a few drops of iodine to it. The colour of the unknown food item changes to blue-black.

The change in colour of the food item to blue-black indicates the presence of

Which of the following is not true about the olfactory system?

What is the meaning of nomenclature ?

Animal possess canal system

Select the correct statement about meiosis from the options given below.

The combination of tropospheric ozone, smoke and fog produces

Most of the digestive enzymes belong to the class of

What are centrioles ? Write about their functions.

everywhere and at every platform food experts regard pizza as one of the disasterous food for health.i also eat it twice a year only.but i had observed that it has things like onion,tomato,mushroom etc .the base is also made up of atta as claimed by companies like dominos. the cheese is also a dairy product which is very healthy for our health.so why it is regarded as a food which is not good for our health?????

A dikaryon means

Why are the cells generally of a small size ?

Study the diagram given below and then answer the questions that follow :

(a) Identify the cell.
(b) Name the parts labeled 1, 2, 3, 4, 5, and 6.
(c) Where is this cell likely to be found in the human body and what is its function?

Mammals and birds have an internal heat producing mechanism. Hence, they are called ___.

The best way of treating kitchen waste is

Parenchyma is a type of ___ permanent plant tissue.

Why are larger organisms made up of greater number of cells ?

Which of the following is not a research laboratory waste?

Bacteria reproduce by the process of binary fission. A population of bacteria doubles itself in 15 minute

If initially one bacterium is placed in a nutrient medium, then how many bacteria will be present in the culture after an hour?

Statement 1: Portal vein begins from one organ as capillaries and ends in another organ as a vein.

Statement 2: The hepatic portal system is an example of the portal circulation.

In dessert plants, rate of water loss gets reduced due to the presence of __________.

Study the diagram given below and then answer the questions that follow :

(a) Name the parts labelled 1, 2, 3, 4, 5 and 6.

(b) Identify the tooth and give a reason to support your answer.

(c) Describe the structure of the part labelled '3'.

(d) Give the total number of the type of tooth mentioned in 'l' above, in the mouth of an adult and state its function.

How are chromatin, chromosomes and chromatid related to each other.

How does plant tissue,animal tissueand human tissue differ from each other?

Exchange of gases between the blood and the tissues of the body takes place by which of the following mechanism?

Write the functions of parenchyma, collencyma and sclerenchyma.

Identify the congenital disease.

Yeast reproduces asexually by .......

Glucose is not used for making which of the following compounds in the plant?

Which one of the following pairs is not correctly matched?

Name the capillaries that surround the renal tubule.

Exotic breed of honey bee is:

___a reproductive hormone that plays a role in the activity of mammary glands.

Which of the following are local health organizations?

Which of the following are male reproductive parts of a flower?

Which is the best method to separate the solute from a solution, when only solute is required?

What is difference between epidermis and epithelial tissue ? They both are the outermost layer of the cell. Explain

Which of the following is not an chronic disease?

What is the surgical method for female for contraception?

Explain the general characters of phylum Arthropoda. Give one example of following classes (i) Crustacea; (ii) Myriapoda; (iii) Insecta; (iv) Arachnida.

Give an example of biological weed control.