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Kalam's childhood was

(a) secure

(b) insecure

(c) austere

Describe the types of nerves along with examples.

A piece of thread was tied tightly around an animal's pancreatic duct. The animal subsequently had difficulty in digesting food but did not get diabetes. Explain.

Write the main steps in the coagulation of blood in their correct sequence?

Question 10
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)

When organs have similar functions, but different structure and origin, they are called

Question 4
Which is the correct sequence of parts in a human alimentary canal?

(a) $Mouth\to stomach\to smallintestine\to oesophagus\to largeintestine$
(b) $Mouth\to oesophagus\to stomach\to largeintestine\to smallintestine$
(c) $Mouth\to stomach\to oesophagus\to smallintestine\to largeintestine$
(d) $Mouth\to oesophagus\to stomach\to smallintestine\to largeintestine$​​​​

Explain the following terms :

(a) Motor nerve .............................

(b) Autonomic nervous system .....................

(c) Conditioned reflex .............................

(d) Association neuron ..........................

(e) Grey matter .............................

The part of the nephron impermeable to water is ________ .

In reference to vasoconstriction and vasodilation, they are

Question 7.

What is sludge? Explain how it is treated?

If we don’t sleep well,

(a) we may lose our appetite.

(b) we may become very thin.

(c) our brain might stop functioning in a balanced manner.

(d) production of brain chemicals would increase.

Given below are the end products of different reactions involving glucose.

Write the reaction number in front of the following:

(1) Anaerobic reaction =

(2) Reaction in human muscles =

(3) Aerobic respiration =

(4) Reaction in plant cells =

(5) Reaction in liver =

Which are the most unspecialized mass of cells?

One of the following organisms does not reproduce by fission. That is :
(a) Amoeba
(b) Leishmania
(c) Planaria
(d) Plasmodium

___ was the scientist who explained the theory of acquired characteristics after Darwin.

What breaks down big fat globules into smaller globules during digestion?

Who tells the lungs that your body needs more oxygen which increasing the breathing rate

The characteristics transmitted from parents to offspring are present in :
(a) cytoplasm
(b) ribosome
(c) golgi bodies
(d) genes

Question 16

A trait in an organism is influenced by



(a) paternal DNA only

(b) maternal DNA only

(c) both maternal and paternal DNA

(d) neither by paternal nor by maternal DNA

Match List - I with List -II





$\begin{array}{cccc}& \text{List - I}& & \text{List - II}\\ \text{(a)}& \text{Cohesion}& \text{(i)}& \text{More attraction in}\text{liquid phase}\\ \text{(b)}& \text{Adhesion}& \text{(ii)}& \text{Mutual attraction}\text{among water molecules}\\ \text{(c)}& \text{Surface tension}& \text{(iii)}& \text{Water loss in liquid phase}\\ \text{(d)}& \text{Guttation}& \text{(iv)}& \text{Attraction towards}\text{polar surfaces}\end{array}$



Choose the correct answer from the options given below :

Did we evolution from chimpanzee or fishes ...? Even if we are evoluted from fishes then why don't they fall into the genus homo?

A steel column is to support a factored load of $1200kN$. The column ends are flushed for complete bearing at a section where it is to be spliced as shown in figure. The allowable stress in the splice plate is $240MPa$. The thickness (in mm, rounded off to the multiple of 2) of the splice is: (Take the width of splice plate is $250mm$)

Match the following
$\begin{array}{cccc}& A& & B\\ 1& \text{Pharynx}& a& \text{Differentiates food and wind pipe}\\ 2& \text{Cartilage in windpipe}& b& \text{Connection between larynx and trachea}\\ 3& \text{Larynx}& c& \text{Adam's Apple}\left(Voicebox\right)\\ 4& \text{Epiglottis}& d& \text{Prevents collapse of tracheal structure}\end{array}$

A normal couple (not suffering from colour blindness) has a colour blind child. What are the possible genotypes of the couple?

How can the knowledge of processes of reproduction help people in limiting the size of their families? Give two concrete examples.

The structure formed when the chromatin network condenses during cell division is called ___

Question 7 (iv)
Mark ‘T’ if the statement is true and ‘F’ if it is false:
(iv) The fishes have lungs for breathing.

Question 24

In human males, the testes lie in the scrotum, because it helps in the



(a) process of mating

(b) formation of sperm

(c) easy transfer of gametes

(d) all the above

Name the hormones related with the female reproductive system?