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In which age group, puberty takes place in humans?

Water is used up in green leaves as a raw material in the synthesis of glucose. This process is called____.

Which gas causes the depletion of the ozone layer in the upper atmosphere of the Earth?

With respect to the given assertion and reason, choose the right option

Assertion [A]: Lichens are the primary colonizers of bare rocks.
Reason [R]: Lichens are called pioneer organisms.

The first cloning was done on a ___.

What is a notochord? What does it do? [2 MARKS]

A black mouse mates with a brown mouse, and all the offsprings are black.

(a) Why are no brown offsprings produced ?

(b) If two of the black offsprings mate with each other what kind of offspring would you expect and in what proportions ? Give reason for your answer.

The procedure of an experiment is given as: Destarch the given potted plant. Cover a portion of leaf with a strip of black paper and keep it in sunlight for 6 hours. Test the presence of starch in the leaf.

What is the aim of the above experiment?

Hormones from the anterior pituitary directly affect the release of which of the following?

Is the common edible mushroom an aototroph or a heterotroph?

Marine annelids with parapodia are:

Chromosomes which have definite role in sex determination are

All the plants in the world are autotrophs. Is this statement true or false? Explain your answer. [2 MARKS]

Which of the following types of leaves are found in dicot plants?

(a) What are sexually transmitted diseases? Give two examples of sexually transmitted diseases.
(b) Which method of contraception prevents fertilised egg from being implanted in the uterus?

Which is the most important factor for continuity of a species from an evolutionary point of view?

List the steps in which we can manage garbage we producec.

Which of the following cells last a lifetime and cannot be replaced once dead?

Give following distinct function each of seminal vesicles and prostrate gland.

The function of a neutrophil is to ________ .

Diabetes mellitus is caused by the deficiency of ______.

Maximum number of antibiotics are got from any group except for

Define emulsification

Why is vegetative propagation practised for growing some types of plants?

A haemophilic man marries a normal (non-carrier) woman. What is the possibility of them having a daughter suffering from haemophilia?

Explain translocation in phloem tissue.

Sunken stomata is commonly found in leaves of ___________.

Name the blood vessel that brings oxygenated blood to the heart chamber.

What are the methods to do by a man to secrete pituitary harmone ?

Which of the following conditions result in Turner's syndrome?

Oxygen-rich blood from the lungs comes to the thin-walled upper chamber of the heart to ______.

Question 1
Which of the following statements about the autotrophs is incorrect?

(a) They synthesise carbohydrates from carbon dioxide and water in the presence of sunlight and chlorophyll.
(b) They store carbohydrates in the form of starch.
(c) They convert carbon dioxide and water into carbohydrates in the absence of sunlight.
(d) They constitute the first trophic level in food chains.

Match the following:

$\begin{array}{cc}\text{I. Multipolar neuron}& \text{p. Two processes}\\ \text{II. Bipolar neuron}& \text{q. Single process that splits into two}\\ \text{III. Unipolar}& \text{r. One axon and many dendrites}\\ \text{IV. Pseudounipolar neuron}& \text{s. Found in embryonic state}\end{array}$

Observe the given picture carefully and match A, B and C with their correct name and function from the table given below:

$\begin{array}{ccc}Organ& Name& Function\\ A& Pancreas& Storesbile\\ B& Gallbladder& Pancreaticjuice\\ C& Liver& Secretesbile\end{array}$

The elastic and flexible organ in the human excretory system is

Choose the one term from the following which includes the other three: broccoli, wild cabbage, cauliflower, cabbage

The hormone progesterone released during the luteal phase is secreted by

Which of the following are the steps taken for pre-disaster management?

The layer that is used to separate the atmosphere from space is called___

(a) "Respiration is a vital function of the body". Justify this statement.
(b) What is the main difference between aerobic respiration and anaerobic respiration ? Give one example of each.
(c) What type of respiration takes place (i) in yeast, and (ii) in humans?

(i) How does the air necessary for breathing enter the body of a human being

(ii) what other functions are performed by this part of a respiratory system?

The bending of shoot due to auxins during phototrophic movements occurs:

What is transpiration pull?