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_____________ is a period of physical, mental and emotional changes

Regarding the Assertion and Reason, choose the correct option:

Assertion [A]: Sympathetic and parasympathetic systems have opposing functions.

Reason [R]: The parasympathetic nervous system ‘prepares you’ for action, while the sympathetic system ‘calms you’ down after action.

DIRECTIONS: The following questions have four choices (a), (b), (c) and (d) out of which only one is correct. You have to choose the correct alternative.

Amoeba takes in food by endocytosis it means

Name one Wildlife Sanctuary and one National Park which are contained in Pachmarhi Biosphere Reserve.

Describe the structure of a cell.

Description of the process of curd making

The xylem in a plant

In a population interaction, if the stronger partner (fit) survives and the weaker partner perishes, the interaction is

Organic matter formed due to the death and decay of plants and animals is called as ___ .

Bisexual flowers undergo which type of pollination?

Pseudopodia is

Which of the following cell is visible to human eye?

Name the instrument (or device) which is needed to see the micro-organisms.

What do the rock paintings found in rock shelters of Satpura National Park depict ?

Cushings syndrome results from:

Write the path of $O_2$ from trachea to respiring tissue cell. [2 MARKS]

Which one of the following is present in the secondary cell wall?

Which of the following is used as a biofertiliser?

Which of the following species not exists?

(a) BF₃

(b) NF₃

(c) PF₅

(d) NF₅

The following animals are called ___ because they lay eggs.

Name : (a) female sex hormone, and (b) male sex hormone.

What substance is secreted by sebacious glands ?

Statement 1: Vacuoles are large and prominent in an animal cell and small in plant cell.

statement 2: Centrosomes are absent in an animal cell.

Identify the incorrect statement(s).

I. The nerves carrying impulses from CNS to peripheral system are Sensory nerves or Afferent nerves

II. The nerves carrying impulses from peripheral system to CNS are Motor nerves or Afferent nerves

III. Sensory system coordinates auditory, visual, touch receptors etc.

IV. Motor system coordinates impulses towards effector organs.

Which of the following is not an eco-friendly method of controlling pests?

Algae have cell wall made up of

What do we call the structures made of concrete or steel that store water used for irrigation?

Bholu took some top soil and mixed it with lots of water in a glass. He then allowed it to settle for a while. He found that many layers were formed. Starting from the bottom of the glass, choose the option which gives the correct sequence of soil layers.

Assertion: Protons or hydrogen ions produced by photolysis of water accumulate in the lumen of thylakoids.
Reason: Photolysis of water takes place in the inner membrane of thylakoids.

Meristematic activity occurs in the

Which of the following are essential for sustaining human life?

Which of these is not a chronic obstructive pulmonary disease?

The difference between a habitat and a niche is that a niche is:

Point out the incorrect set of differences.



$$\begin{array}{ccc}\text{S.No}& \text{Zoo}& \text{Sanctuary}\\ A)& \text{Artificial Habitat}& \text{Natural Habitat}\\ B)& \text{Open to general public}& \text{Not opened to general public}\\ C)& \text{Animals and birds are left free}& \text{Animals and birds are kept in captivity}\\ D)& \text{They form a part of tourism}& \text{They do not serve the purpose of tourism}\end{array}$$