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Identify the type of joint.

Question 19

Under a microscope, Paheli observes a cell that has a cell wall but no distinct nucleus. The cell that she observes is



(a) a plant cell

(b) an animal cell

(c) a nerve cell

(d) a bacterial cell

If a population of 50 paramecia present in a pool increases to 150 after an hour, what would be the growth rate of population?

Name the method of pollination based on pollinating agent observed in the picture?

Which of the following is a nonessential amino acid?

The males of honeybee are produced by

What is the composition of skeleton of Echinodermata?

Given below are four jumbled sentences. Select the option that gives their correct order.

$A:$ Then, they spread as the unmined coal starts burning with oxygen drawn from pores and mine shafts.

$B:$ An entire township Jharia is to be relocated because of the uncontrollable underground fires.

$C:$ These fires start mostly from burning trash close to coal pits.

$D:$ This is a grave threat as poisonous fumes of carbon monoxide rise up from underground fires.

RNA polymerase II is responsible for transcription of

Cell elongation in internodal regions of the green plants takes place due to:

There are around ________ testicular lobules.

Give a brief account of the counter current mechanism.

Match the following

Column-I Column-II

(i) Micropyle (a) Opposite to Micropyle

(ii) Chalaza (b) Female gametophyte

(iii) Embryo Sac (c) Pore of the ovule

(iv) Nucellus (d) Nutritive tissue

(v) Ovule (e) Integumented megasporangium

The unique features of mammals are :

I. Body is covered with skin and hair which are thermoregulatory in function.

II.Gives birth to a fully developed infant after gestation.

III. Feeds the infant with milk from modified sweat glands.

IV. All the mammals are not viviparous.

Which of the above statement(s) are incorrect?

Match the following



Column - I Column - II



(a) Valium (p) Pernicious anemia

(b) Morphine (q) Analgesic

(c) Norethindrone (r) Tranquilizer

(d) Vitamin B-12 (s) Antifertility drug

System of special ductless glands to coordinate various functions is ____.

Consider the Assertion and the Reason, and choose the correct option.

Assertion [A]: All muscles follow “all or none” principle.

Reason [R]: If a stimulus is above a certain threshold, a nerve or muscle fiber will fire.

A new approach to conservation is the establishment of

What
is development? How is it different from growth and maturation?

Increased asthmatic attacks in certain seasons are related to :

Marchantia differs from Funaria in

IARI has released vegetable crops rich in nutrients. Match the following crops with their nutrients.
$\begin{array}{cc}ColumnI& ColumnII\\ P.VitaminA& 1.SpinachandBathuna\\ Q.VitaminC& 2.Broadbean,FrenchbeanandGardenPea\\ R.Fe\&Ca& 3.Carrot,SpinachandPumpkin\\ S.Protein& 4.Bittergourd,Bathuna,Mustard,Tomato\end{array}$

In the Lac operon system, β-galactosidase is coded by

Gene regulation governing lactose operon of E.coli that involves the lacI gene product is:

Is there any difference bw azeotropes and azeotropic mixture?

A certain purified DNA was cut with two restriction endonucleases E1 and E2. The results were obtained from agarose gel electrophoresis

Sample cut with E1 alone: two bands of size 35 kb and 15 kb

Sample cut with E2 alone: two bands of size 40 kb and 10 kb

Sample cut with E1 and E2 simultaneously: three bands of size 35 kb, 10kb and 5 kb

From this data it can be inferred that the DNA has

What is Forensic chemistry related to?

Which hormone deficiency is responsible for the following?

(a) Diabetes mellitus

(b) Goitre

(c) Cretinism