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Identify A and B and also mention any one function of A. When does implantaion takes place. [3 MARKS]

Which of the following organs forms the common passage for both food and air?

Both Jainism and Buddhism were against ____________

Which among the following is the second stage of mitosis?

The tissue responsible for the growth in plants is____.

dermal tissue

vascular tissue

meristematic tissue

ground tissue

Which of the following movements occur continuously in our body, even when we are asleep?

Describe general characteristics of phylum Annelida. Give one example each class of Annelida.

The basic filtration unit of the kidney is called _______.

Secondary growth does not occur in monocots as their vascular bundles are

Which of the following is a correct pair?

The steps involved in the formation of urine are given below. Arrange them in the correct sequence.

1. Collection of urine

2. Ultrafiltration

3. Reabsorption of ions from renal tubules

4. Collection of glomerular filtrate

5. Excess urea secreted from peritubular capillaries

Name two diseases transmitted by the cntaminated food and water.

Why water is necessary for living organisms ? Explain.

What is the reason of increasing concentration of carbon dioxide in the atmosphere?

What is the function of lignin deposition in cell wall

Which of the following is not a step in mushroom cultivation?

Which of the following is food for parameocium?

Statement 1: Bile juice is yellowish in color.

Statement 2: Bile has certain pigments produced by the breakdown of the dead and worn-out red blood cells.

The squeezing movement of WBCs from an intact capillary wall towards a surrounding body tissue is known as:

Assertion: Plastic bags remain as harmful substances in both soil and water.

Reason: Soil microflora lacks bio-catalysts for rendering plastics harmless.

Carrier of malaria-causing protozoan is :

What is the nature of folic acid?

Which of the following gas is dissolved in soft drinks ?

Which one of the following diseases is caused by protozoans?

Question 16
Organisms without a nucleus and cell organelles belong to

(i) Fungi
(ii) Protista
(iii) Cyano bacteria
(iv) Archae bacteria

(a) (i) and (ii)
(b) (iii) and (iv)
(c) (i) and (iv)
(d) (ii) and (iii)

The amount of volume of air which can be inspired/expired normally is called

Which of the following division is known as the amphibian of the plant world?

Which of the following is a characteristic feature of ferns?

In our body, anaerobic respiration occurs in __________.

AIDS virus affects the body’s immune system. Which of the following acts does not lead to the transmission of AIDS?

In Pinus lifecycle megasporangium formed from the parent sporophyte is i which produces haploid megaspores by ii .

The information in which alternative complete the given statement?

Which of the following is a type of self-induced movement?

Stroke volume is the amount of blood the left ventricle pumps out in one cardiac cycle. This is around 70ml. Now, to get the cardiac output, we have to multiply (i)__ with the normal heart rate of (ii)__ /min and we get (iii)__ ml/min. This means that in one minute, each ventricle of a normal heart pumps about (iv)__ litres of blood out.

The air we breathe in, contains 21$\%$ of ______ and 0.04$\%$ of ______.

The most abundant element present in plants is

Given below is a randomly arranged list of events that occur at the neuromuscular junction to trigger muscle contraction.Which of the following gives the correct sequence of these steps?

(i) Acetylcholine binds to the receptor sites on sarcolemma

(ii) Nerve impulse

(iii) Release of Ca+2 from sarcoplasmic reticulum

(iv) The neurotransmitter acetylcholine is released

(v) Sarcomere shortens

(vi) Acetylcholine diffuses across the synaptic cleft

(vii) Spread of impulses over sarcolemma on T-tubules

What is hierarchy of categories? Describe the same.

Oxygen was discovered by:

Explain exchange of gases and respiration in unicellular organisms [3 MARKS]

Vitamin D production in the skin depends on

Question 32
A junction between two neurons is called

(a) cell junction
(b) neuro muscular junction
(c) neural joint
(d) synapse

Select the region that represents y${}^2$.

Bryophytes and Tracheophytes can be differentiated on the basis of which of the following?

Q1. Zika Virus is related to which of the following virus/es

1. Yellow fever

2. Dengue

3. Japanese encephalitis

An eukaryotic cell ranges in size from: