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शाम होते ही कौन-कौन घर की ओर लौट पड़ते हैं?

Bacteria reproduce by _________.

Identify the organelle and the part labelled 'A' depicted in the given figure.

___ cavity consists of a movable tongue and salivary glands.

Which of the following step(s) should be followed for maintaining personal hygiene?

Main sugar present in the honey is:

Why are jams, pickles and ghee canned?

Match Column A appropriately with Column B.

$$\begin{array}{cc}ColumnA& ColumnB\\ \text{(i)The Central Nervous System constitutes of}& \text{1.Ears,Eyes,Nose}\\ \text{(ii)Reflex arcs are formed in}& \text{2.Olfactory}\\ \text{(iii)Receptors that detect taste}& \text{3. Spinal cord and the Brain}\\ \text{(iv)Receptors that detect smell}& \text{4. Muscles and Glands}\\ \text{(v)Examples of receptor organs are}& \text{5. Gustatory}\\ \text{(vi)Examples of effector organs are}& \text{6. Spinal Cord}\\ \text{(vii)Peripheral Nervous System consists of}& \text{7. Spinal nerves from the spinal cord and cranial nerves from the brain}\end{array}$$

Regarding the assertion and reason, select the option that is correct.

Assertion: Viruses are classified as living organisms.

Reason: They have very simple, non-cellular structures and cannot exist independently.

The following image depicts a technique of vegetative propagation. Identify the method.

What is the main purpose of photosynthesis in autotrophs?

The increase in the concentration of toxic waste per trophic level is called:

Which among the following images depict a balanced diet.

Fill in
the blanks:

(a) The main steps of nutrition in humans are __________,
__________, ___________, __________ and
__________

(b) The
largest gland in the human body is __________.

(c) The
stomach releases hydrochloric acid and ________ juices which
act on food.

(d) The inner wall of the small intestine has many finger-like
outgrowths called __________.

(e) Amoeba
digests its food in the __________.

Identify pseudopodia in the Amoeba.

Question 3

What are the raw materials that are obtained by an organism externally?

John met with an accident and had a fracture. Which test/report clearly gives the fracture details to the doctor?

What does the following symbol on a packaged food represent?

The plants gives out carbon dioxide at the night time if it is true ,than from where we get oxygen at the night time?

Idol makers in Bengal use rich soil found plentiful on the banks of the river Hooghly to make stunning religious figure of Goddess Durga. What type of soil do they use and why so? [2 MARKS]

What is the effect of antibiotics from animal sources on salmonella?

Hormone X produces its effect in its target cells via the cAMP second messenger system. Which of the following will produce the greatest effect in the cell?

Match the following.

Look at the figure given below. Draw another figure of the same set-up as would be observed after a few hours.

Briefly describe the structure of the reproductive organ of a plant.

Identify the powerhouse of the cell.

How do rizobium bacteria and leguminous plants help each other in their survival ?

What is the full form of MRP in packaged food items?

Why do antiseptics differ from disinfectants? Give one example of each.

Which of the following substances needs to be transported to each cell in a living organism for its proper functioning?

Which of the following is Chlamydomonas?

Which one of the following pollination is autogamous?

Question 3
The brain is responsible for

(a) Thinking
(b) Regulating the heartbeat
(c) Balancing the body
(d) All of the above