Explore topic-wise InterviewSolutions in Current Affairs.

1. Midgut or mesenteron: It consists of stomach and hepatic caeca. 

2. Ventriculus or stomach: It is straight, short and narrow. Stomach is lined by glandular epithelium which secretes digestive enzymes. 

3. Function: It is mainly responsible for digestion and absorption.

The correct answer is (D) all of these

The correct answer is (A) Cursorial

Hindgut or proctodaeum: It consists of ileum, colon and rectum.

Body division: The body is divided into three regions viz. head, thorax and abdomen. 

Abdomen: 

1. The abdomen is elongated and made up of ten segments. Each segment has a dorsal tergum and ventral sternum. 

2. Tergum is jointed to the sternum laterally by a soft cuticle called pleura. 

3. The posterior segments are telescoped in. Due to this, the eighth and ninth terga get overlapped by the seventh. The tenth tergum projects backward and is deeply notched. It bears a pair of small, many jointed anal cerci. 

4. The abdomen is narrow and tapering in males as compared to females.The ninth sternum of males also bears a pair of short, unjointed anal style.

1. Male reproductive system includes primary and secondary reproductive organs. 

2. Primary sex organs (male gonads) are called testes. They are paired and located in the 4th and 6th abdominal segments. Sperms produced in testis are carried by vasa deferentia. 

3. Vasa deferentia is a pair of thin tubular structure that arise from the testes and open into ejaculatory duct through seminal vesicle. They carry sperms to ejaculatory duct. 

4. Ejaculatory duct opens into male gonopore situated ventral to anus.

5. Sperms produced by testis are stored in seminal vesicles in the form of bundles called spermatophores. These spermatophores are deposited in female reproductive tract during copulation. 

6. Mushroom shaped gland or utricular gland is an accessory reproductive gland. It is present in the 6th – 7th abdominal segments.

7. Male gonapophyses or phallomere form the external genitalia of male. These are three asymmetrical chitinous structures surrounding the male gonophore.

Proventriculus

After sufficient growth, nymph undergoes moulting and enters into this stage: Instar

Food supplement means a nutrient that is added to your diet to nourish your body that you are not getting in your regular diet. Food supplements generally include Vitamins, minerals, fibre, fatty acids or amino acids, among other substances. These supplements may be in the form of a tablet or powder which can be added to motor of milk for consumption. 

Need of food supplement for children: No doubt that food supplements play a vital role in proper growth and development of children. Though, it is not essential to consume food supplements but becomes necessary when there is a lack of proper nutritious diet. In fact, it can be said that food supplements are unnecessary if a child takes a balanced diet regularly. Moreover, there are various food supplements omega-3 fatty acids has been shown to be without benefit for healthy children. It means that if child takes a balanced or nutritious diet regularly, there will not be any benefit of taking food supplement on that child.

Quality of life means how you live your life, what type of healthy you are having. If you are healthy and enjoying your life, it can be said that you have a good quality of life.

Difference between thallophyta and bryophyta:

• Ferns belong to the group of plants called Pteridophyta.
• They have well-developed roots, stem and leaves but do not bear flowers and fruits.
• They have separate tissues for the conduction of food and water. 
• They reproduce with the help of spores formed along the back or posterior surface of their leaves. 
• They reproduce asexually by spore formation and sexually by zygote formation.

Advantages of food supplements: 

1. These products help to improve performance, especially weight training and sports performance. 

2. Food supplements help to overcome deficient nutrients, thus fulfill the body needs. 

3. These products are easily available from medical stores. 

Disadvantages of Food supplements: 

1. The products are more expensive than natural food; moreover, they have less nutritional value than fresh fruits and vegetables. 

2. Prolonged usage and excessive taking of these food supplements is often harmful for body and develop unknown and unexpected risk over health of individual. 

3. These products require many instructions for their usage which are difficult to be followed properly. 

4. Food supplements may provide benefit but researches on this prove that they are less healthy than natural diet or food. Thus, balanced diet is the best food. 

5. These dietary supplements pose adverse side effects over health or individual. 

6. Most of these products are synthetic or chemicals, however, long usage of these food supplements may cause cancer.

1. (c) 

2. (e) 

3. (a) 

4. (b) 

5. (d)

The movement of the Earth on its axis is called Rotation

(c) 1,2 and 3

1. The dwarf planets share their orbits with others.

2. The five dwarf planets of the solar system are Pluto, Ceres, Eris, Makemake and Haumea.

1. Big Bang 

2. Light year 

3. Sun 

4. Wanderer 

5. Jupiter 

6. Chandrayaan – I 

7. 231/2 

8. 21st March and 23rd September 

9. Closest 

10. Terminator Line

1. Big Bang 

2. Uranus 

3. Cosmology 

4. Gaseous giants 

5. Verms 

6. Viars 

7. Jupiter 

8. Saturn 

9. Uranus 

10. Halley’s Comet 

11. Meteors 

12. Earth 

13. Rotation 

14. Equinoxes 

15. Atmosphere

(a) We should be aware that even the tiniest creature needs room.

(b) It means that as long ‘as we live in this world’.

The above line tells us that every human being is unique and important.

We feel sad when people don’t remember us

I refers to the poet and you refers to the reader.

The message that we learn a lot of lessons in life after going through difficulty and that if anyone gives us even a very small present, it is not without effort, the importance of gratitude in life and respect for people, have been repeated.

Even the smallest gifts deserve a warm thank you.

If we fail to give importance to others, they will feel sad

Correct option is  B) shorter

A) Both statements are true

Volume of a cuboid V₁ = lbh 

= 60 × 40 × 50 

V₁ = 1,20,000 cubic units.

Volume of a cube V₂ = (a)³

= (50)³ = 50 × 50 × 50

V₂ = 1,25,000 cubic units.

∴ The cuboidal box requires less amount of material.

∴ V₁ < V₂

Total surface area of a cube = 6a² 

⇒ 6a² = 600 

⇒ a² = 600/6 = 100 

⇒ a² = 100

⇒ a = √100 = 10 

∴ The side of a cube (a) = 10 cm.

l = 20cm, b = 15cm, h = 12cm. 

∴ Total surface area of a cuboid 

A = 2(lb + bh + lh) 

=2(20 × 15 + 15 × 12 + 20 × 12) 

= 2(300 + 180 + 240) 

= 2 × 720 

= 1440 sq.cm. 

The cost of painting a cuboid at the rate of 5 paisa per sq. cm for 1440 sq.cm. 

= 1440 × 5 paisa 

= 7200 paisa

= ₹ 7200/100

= ₹ 72

(c) at mount Everest (if tried)

Given that rainfall recorded in a certain day= 5cm = 0.05m

Area of the field = 2 hectare

We know that 1 hectare = 10000 m²

Area = 2 × 10000

Area = 20000 m²

Total rain in the field= area of the field × height of the field

=0.05 × 20000 = 1000 m³

Correct option is (C) 4500 litres

Quantity of water = Volume of rainfall

\(=6\times5\times0.15\,m^3\) \(=4.5\,m^3\)

\(=4.5\times1000\,litres\)

= 4500 litres

Correct option is  C) 4500 litres

It is given that, 

Rain recorded in a certain day = 5 cm = 0.05 m 

Area of the field = 2 hectare 

= 2 × 10000 m² 

= 20000m² 

Therefore, 

Total rain over the field = Area of the field × Height of the field 

= 0.05 × 20000 

= 1000 m³

Answer is (A) Speaker

5^m ÷ 5⁻³ = 5⁵

5_{m − (− 3)} = 55 (a_m ÷ a_n = a_{m − n})

5_{m + 3} = 5₅

Since the powers have same bases on both sides, their respective exponents must

be equal.

m + 3 = 5

m = 5 − 3

m = 2

Correct option is (A) 1

\(2^{7x-7}\) = 1 \(=2^0\)

\(\Rightarrow\) 7x - 7 = 0

\(\Rightarrow\) \(x=\frac77=1\)

Correct option is    A) 1

According to wave theory, when a wavefront strikes a metal surface, the free electrons at the surface absorb the radiant energy continuously. Also greater is the intensity, greater are the amplitudes and energies of the wave' Hence, higher intensity wave should liberate photoelectrons with greater kinetic energies.

A light wave of sufficient intensity should be able to eject electrons, whatever may be the frequency and each electron intercepts an insignificantly some amount of energy and therefore should require a finite time to escape from the metal surface. 

Where as, according to photoelectric effect, maximum kinetic energy of emitted photoelectrons is independent of the intensity of incident radiation. High energy, (higher frequency) radiations of very low intensity can emit photoelechons, whereas higher intensity but low energy (below threshold energy) can't Wave theory fails to explain the existence of threshold energy. Also, emission of photoelectrons is instantaneous Process (within 10^-9 sec).

The two required distinct features are:

(i) Maximum K.E. of emitted photo electrons, is independent of the intensity of incident light (of a given frequency).

(ii) No photo emission takes place from a given photo emitting surface if the frequency (wavelength) of the incident light is less than (more than) a critical or threshold frequency (wavelength).

We can understand these features on the basis of the photon theory as follows .

(i) Increases in intensity increases only the number of incident photons but does not increase the energy ( = hv) of these photons . Hence there is no increase in the maximum K.E. of the emitted photo electrons.

(ii) No photo emission can take place if the energy of the incident photon (= hv = hc/λ) is less than the work function of the photo emitting surface. Hence, there is a minimum (maximum) critical or threshold frequency (wavelength) for given photo emitting surface.

According to wave theory:

(i) The maximum kinetic energy o.f the emitted electron'should be directly proportional to the intensity of incident radiations, but it is not observed experimentally. Also the maximum kinetic energy of the emitted electrons should not depend upon incident frequency according to wave theory, but it is not so.

(ii) Electron emission should take place at all frequencies of radiations, i.e. there should not exist the threshold frequency, This fact contradicts experimental observation.

(iii) There should be a time lag in photo electric emission but according to observation photo electric emission is instantaneous.

The physical significance of \(\lim\limits_{q\to 0}\) in the definition of electric field E = \(\lim\limits_{q\to 0}\cfrac{F}{q}\)

The point test charge q produces its own electric field, hence it will modify the electric field strength to be measured. Therefore, the test charge used to measure the electric field must be too small.

The electric lines of force are shown in figure above.

The charge which detects the effect of the source charge. 

The charge which produces the electric field. 

Radially inward 

Radially outward 

The dipole moment vector is directed from negative to positive charge along the dipole axis. 

newton per coulomb (NC^-1) 

The electric field strength at a point in an electric field is defined as the electrostatic force acting on a unit positive charge when placed at that point and its direction is along the direction of electrostatic force.

Electric field strength is a vector quantity.

Dipole moment a vector.