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17. State two vital functions of human kidney. (2)

Identify trachea from the given image.

One of the following organisms does not reproduce by budding. This is :
(a) Sponge
(b) Yeast
(c) Hydra
(d) Planaria

Study the following diagrams showing various stages of binary fission in Amoeba:

The correct sequence of these diagrams should be:

What was the reason for young Paul's restlessness at the beginning of the story? How did it find expression?

What is the most important characteristic feature of birds when compared to fishes, amphibians and reptiles?

Which among the following is not a non circulating fluid:

Central nervous system can be depressed by the use of which of the following:

what is Schwann cell?

Name the areas of a Woody stem through which respiratory exchange of gases take place.

The set of intelligent students in a class is

What makes the concept map of fermentation in yeast complete?

1. What is the funniest thing the baby does?


2. Do you think the baby sister is really silly? Why?

Fill in the blanks:​

​(a)

The insects, butterflies, honeybees and birds help flowering plants in _______.



(b)

A forest is a purifier of _______and ______.



(c)

Herbs form the________ layer in the forest.



(d)

The decaying leaves and animal droppings in a forest enrich the ___________.

The adrenal glands are located on _________.

A person wears eye glasses of focal length f = -70 cm. What is the far point of the person? [2 MARKS]

Write the components of Appendicular Skeleton.

Which gland secretes the hormone calcitonin?

The range of pH for acidic rain is :

A)What is capsid?

B)what is mycelium?

A metastatic cancerous tissue is termed ‘sarcoma’ if the disorder is in:

Though in asexual reproduction clone formation takes place but evolution can take place in them how?

Mother's antibodies are passed on from the mother to the child. Which type of immunity does this depict?

Why are the white blood cells known as the soldiers of the body?

New species may be formed if :
(i) DNA undergoes significant changes in germ cells
(ii) chromosome number changes In the gamete
(iii) there is no change in the genetic material
(iv) mating does not take place
(a) (i) and (ii)
(b) (i) and (iii)
(c) (ii), (iii) and (iv)
(d) (i), (ii) and (iii)

(a) Explain how, the air we breathe in gets cleaned while passing through the nasal passage.
(b) Why do the walls of trachea not collapse when there is less air in it ?
(c) How are oxygen and carbon dioxide exchanged in our body during respiration ?
(d) How are lungs designed in human beings to maximise the exchange of gases ?

Question 59

Mention the major events during photosynthesis.

Question 22

Match the items of Column A with those of Column B.

$\begin{array}{cc}\text{Column A}& \text{Column B}\\ \text{(a)Sulphur dioxide}& \text{(i)Damage ozone layer}\\ \text{(b)Carbon dioxide}& \text{(ii) Reduces oxygen carrying-capacity of blood}\\ \text{(c)Carbon monoxide}& \text{(iii)Acid rain}\\ \text{(d)Chlorfluorocarbons}& \text{(iv)Greenhouse gas}\end{array}$

Which one is an important constituent of renin angiotensinogen–aldosterone system?

Which of the following organelle have their own genetic material?

Which of the following activities will prevent the destruction of an ecosystem?

__________ collects sound waves and carries them to the auditory canal.

Process by which seeds that are placed in water, soak in water and swell up.

What is Miller Urey experiment

In Down's syndrome of a male child, the sex complement