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Which of the following diseases is caused by the virus?

Mention whether the following statements are True or False.
(a) Cow was the first domesticated animal.
(b) Rapidly growing industries favoured population rise.
(c) Present human population growth is follwoing arithemetic progression.
(d) Natality is the ratio of the number of births to the size of the population.
(e) Tubectomy is a popular surgical method of contraception in human males.

Which among the following details are present on the packets of food substances?

When Krishna was taking a test, he was asked to find the odd one out from the given options regarding rubbish things. After reaching home, he asked his mom to help him with the question. What is the correct answer she gave?

Give differences between a zygote and a foetus. [2 MARKS]

When do we call a fruit as aggregate?

Which blood cell forms the clot?

Why is sodium chloride required in our body ?

A. Indians are among the fastest growing immigrant groups in the US.
B. Mr. Ramanathan is one of them.
C. In a $0\%$ unemployment economy, corporates are using everything to attract the right candidates.
D. According to a US Census Bureau, above 44% of Indians who work there hold managerial jobs.
E. He is among the thousands wooed right out of University campuses by companies.
F. It could range from an attractive signing bonus to personalized hand holders.

Grazing animals swallow the grass and store it in a part of their stomach known as __.

Plants carry out gas exchange through ___ .

Wheat dough if left in the open,it start to emit foul smell and became unfit for use. Give reasons.

First vaccine was prepared by

Lining of the stomach is protected by

What is the difference between the cell wall and cell membrane?

What do we name the process that in the absence of oxygen consumes sugar and converts it into different products?

The sharp dip shortly after 1000 A.D. is due to __.

What is plazma?

The process of transfer of pollen from the stamen to the pistil is called __________ .

Part of the brain consisting of the cardiac centre, respiratory centre, and vomiting centre is __________.

Is our saliva acid,base or salt?

______ send signals away from neurons whereas ______ receive signals from other neurons.

Comment on statement: "we will not get any energy if we eat coal." [2 MARKS]

Explain the following digestive organ and write its functions

1. teeth

It is thought that the mitochondrion was once an individual organism, which later became a part and parcel of the eukaryotic cell in the course of evolutionary history. The facts that support this theory are that a mitochondrion has its own DNA and ribosomes, and can produce many of the proteins it needs. When it was independent, it belonged to the kingdom ___.

What is the expected average age of Indians by 2020?

Stomatal openings are surrounded by__.

Animals and most organisms obtain nutrition from food prepared by plants. They are classified as:

Which of the following is a disease caused by protozoans?

The colour of the bile is due to the presence of ____________

What do we call the structure which forms the outside rings of modified leaves and protects the flower?

Watery, swollen and itchy eyes are common symptoms of_________

Similarities and differences between nutrition in amoeba and human beings.

Which gas is utilised by plants during photosynthesis?

Question 15

Match the animals in Column I with their natural place of dwelling (habitat) in Column II.

A flower with both androecium and gynoecium is known as

Choose the correct options for physical characteristics to be observed while selecting good quality seeds.

What do we call a dormant seed which loses viability if in case we dehydrate or freeze the same?

Glucose is oxidized into carbon dioxide, water and energy in __ respiration.

Breathing is a process which occurs: