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1 .Explain how is food pushed in the oesophagus ?

2. How is food pushed through the gut ?

In which of the following was genetic engineering first employed commercially?

Xanthan gum is obtained by fermentation of Starch and ___

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

Which hormone is most likely to be present in greater concentration in areas of rapid cell division?

(क) ऊँट से ऊँची चीज़ों के नाम पर गोला लगाओ।

(ख) ऊँट के नीचे से क्या-क्या निकल सकता है?

(ग) किन-किन चीज़ों की मदद से ऊँट पर चढ़ोगे?

Choose the sexually transmitted bacterial disease from the following:

According to the passage, which practice would not be defined as alternative medicine?

The transport system in plants consists of two kinds of tissues X and Y. The tissue X is made up of living cells and consists of two components A and B. The component A has tiny pores in its end walls and contains only cytoplasm but no nucleus. On the other hand, component B has cytoplasm as well as nucleus. The tissue Y is made up of dead cells and consists of two components C and D. The component C has open ends whereas component D does not have open ends. In flowering plants, either only C or both C and D transport water but D is the only water conducting tissue in non-flowering plants.
(a) What is (i) tissue X (ii) component A, and (iii) component B?
(b) What is (i) tissue Y (ii) component C, and (iii) component D ?

Incomplete development of male secondary sexual characteristics is due to under secretion of the hormone:

Which of the following is an example of imbibition?

If you cut Planaria vertically, you get two equal halves. What does this indicate?

Why do you need iodine in your diet?

The main functions of sympathetic nervous system are _______________________ .

Malaria is caused by a ________ .

The reaction of D-glucose with ammonical $AgN{O}_3$ produces:

In a plant organ covered by periderm or the cork cambium, the stomata are absent. Gaseous exchange occurs through

Question 31

Is the following statement correct? If it is wrong, correct the statement

Statement : “Unicellular organisms do not respire, only multicellular organisms respire.”

Consider the following chemical reactions which take place in different organisms/tissues under various conditions
(i) Glucose $\stackrel{Respiration}{\to }$ Ethanol + Carbon dioxide + Energy
(ii) Glucose $\stackrel{Respiration}{\to }$ Carbon dioxide + Water + Energy
(iii) Glucose $\stackrel{Respiration}{\to }$ Lactic acid + Energy

(a) Name one organism which respires according to equation (i)above.
(b) Name one organism which respires according to equation (ii) above.

(c) When and where does respiration represented by equation (iii) above take place?
(d) Which equation/equations represent aerobic respiration?
(e) Which equation/equations represent anaerobic respiration?
(f)Which of the above reactions produces the maximum amount of energy?

Water and dissolved minerals get into the root hair of a plant by a process called A and enter the conducting tissue B. The process C helps the water and dissolved minerals to move up through the tissue B in roots and stem, and reach the leaves of a plant. In the leaves, food Is made by a process D. This food is then transported to all the parts of a plant through tissue E. The process of distributing food made in the leaves to all the parts of the plant is called F.
(a) What are (i) A (ii) B (iii) C (iv) D (v) E, and (vi) F?
(b) Which tissue is made up of living cells: B or E?
(c) Which tissue, B or E, contains sieve tubes?
(d) Which tissue, B or E, contains tracheids?

Question 53

Why is the flow of signals in a synapse from the axonal end of one neuron to dendritic end of another neuron but not the reverse?

What is pollution?

To make the plant free of starch, it is:

Match the following with repect to glands and disease.

$$\begin{array}{cc}\text{A. Addison's disease}& \text{1. Pituitary}\\ \text{B. Tetany}& \text{2. Thyroid}\\ \text{C. Acromegaly}& \text{3. Adrenal cortex}\\ \text{D. Myxoedema}& \text{4. Parathyroid}\end{array}$$

Why Perestalysis doesn't work while vomiting???

The toxic gas that leaked in the Bhopal gas tragedy was

The rate of photosynthesis is not affected by

The plasma membrane of root hair is ___ in nature.

Who do you think bought and cooked all the food he ate? Were they also to blame for Walter's obesity?

What’s meant by coagulation