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knowithere
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knowithereLEVEL 1
Asked: April 13, 2022In: Physics

An earthworm is hermaphrodite but self fertilization does not takes place ,why?

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  1. knowithere LEVEL 1
    Added an answer on April 13, 2022 at 6:07 pm

    an earthworm is hermophodite but there is no self fertilization because of proandus ( male gamete and female gamete ).

    an earthworm is hermophodite but there is no self fertilization because of proandus ( male gamete and female gamete ).

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Question BankLEVEL 1
Asked: December 21, 2020In: Computer MCQs

What does TCP stand for with respect to computer networks?

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A) Transmission Control Protocol B) Transfer Call Plan C) Transfer Control Process D) Transmission Call Protocol

A) Transmission Control Protocol
B) Transfer Call Plan
C) Transfer Control Process
D) Transmission Call Protocol

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  1. knowithere LEVEL 21
    Added an answer on December 24, 2020 at 10:43 am

    Option A is the correct answer!!! Transmission Control Protocol

    Option A is the correct answer!!!

    Transmission Control Protocol

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Mayush
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MayushLEVEL 1
Asked: September 10, 2020In: Physics

Is there any work done by the car if it moves with a uniform speed on a smooth level road? (Neglect air resistance).

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  1. Niraz LEVEL 3
    Added an answer on September 10, 2020 at 5:49 pm

    No, since the weight of car and displacement of car are at right angles and there is no friction.

    No, since the weight of car and displacement of car are at right angles and there is no friction.

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Question BankLEVEL 1
Asked: September 5, 2020In: Computer MCQs

………..provides a connection-oriented reliable service for sending message

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A. TCP B. IP C. UDP D. All of the above

A. TCP B. IP C. UDP D. All of the above

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  1. knowithere LEVEL 21
    Added an answer on September 14, 2020 at 5:13 pm

    TCP  

    TCP

     

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knowithere
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knowithereLEVEL 1
Asked: June 19, 2020In: Biology

Mention the functions of Trichocyst in Paramecium.

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  1. Tmg enoch LEVEL 14
    Added an answer on June 22, 2020 at 11:28 pm

    The main function of trichoyst is to helps in defensive structure. 

    The main function of trichoyst is to helps in defensive structure. 

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knowithere
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knowithereLEVEL 1
Asked: June 19, 2020In: Biology

Discuss the internal structure of heart with its working mechanism.

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  1. Shyam Stha LEVEL 9
    Added an answer on July 9, 2020 at 1:50 pm

    The internal structure of heart of frog is studied with the help of vertical section. It is a conical hollow, muscular structure with different chambers. The different chambers remain separated by valves which help to keep the one way flow of blood during rhythmic contraction and relaxation of heartRead more

    The internal structure of heart of frog is studied with the help of vertical section. It is a conical hollow, muscular structure with different chambers. The different chambers remain separated by valves which help to keep the one way flow of blood during rhythmic contraction and relaxation of heart.
    The two auricles are thin walled and remain separated from each other by a thin vertical inter-auricular septum. Right auricle is larger than left one as it receives blood from different parts of the body. The sinus venosus opens into dorsal wall of right auricle by a large oval aperture, sinu-auricular aperture. It lies at middle close to inter-auricular septum and remains guarded by a pair of flap like values. The common pulmonary veins open into left auricle, near inter-auricular septum, by a small opening without valves. Both auricles open into ventricle by a common large auriculo-ventricular aperture guarded by two pairs of flap like auriculo-ventricular values.
    The ventricle is thick walled, muscular and spongy in nature. Its inner surface has irregular ridges or folds called the columnae carneae with depressions which is also known as fissures. These folds reduce cavity of ventricle. The flaps of auriculo-ventricular values remain connected with wall of ventricle by thread like chordae tendineae.
    The opening of ventricle into truncus anteriosus is guarded by three semilunar values, which prevent the back flow of blood from truncus arterious into ventricle. The spirally twisted cavity of truncus anteriosus remains divided by three semilunar valves into a long thick walled proximal conus arteriosus or pylangium and a short distal, thin walled bulbous arteriosus or synangium. A longitudinal spiral valve is present on pylangium which remain attached dorsally while free ventrally. It divides cavity of pylangium into left dorsal cavum pulmoutaneum and right ventral cavum aorticum. The common opening of two pulmocutaneous arches lies in cavum pulmocutaneum while separate openings of carotid and systemic arches lie in synangium.

    Working of heart: Heart constantly beats during life time under nervous control to pump blood into blood vessels. Contraction of heart is called systole, while relaxation is called as diastole. When sinus venosus contracts, its non-oxygenated blood passes into right auricle through sinu-auricular aperture the blood from lungs come into left auricle through pulmonary vein. The two auricles now contract almost simultaneously forcing their blood into ventricle through auriculo-ventricular aperture.

    A) OLD VIEW: This view is purposed by Brucke (1858). According to the old view, two kinds of blood do not mix to any great extent on being forced into single ventricle. The two lines of blood could not mix to any great extent because of their viscous nature and also because of the network of columnae carneae.
    When ventricle starts contraction, first the deoxygenated blood from the right side being nearer flows into the truncus arteriosus and directed by the spiral valve into the common opening of pulmo-cutaneous arches and carried to lungs and skin for oxygenation. Spiral valve now closes the opening of pulmo-cutaneous arches. Next follows the mixed blood which is pushed through cavum aorticum into the systemic arches and is sent to the body and limbs. Finally enters the oxygenated blood of left side and directed through carotid arches to the head. Thus, according to old view the spiral value in truncus arteriosus plays an important role in directing blood into different arches.

    B) MODERN VIEW: This view was put-forward by Vandervale (1933) and Foxon (1953), show that it is actually completely mixed blood in ventricle and truncus which flows simultaneously through the three pairs of arches to all parts of the body. The blood received from skin and buccal cavity into sinus venosus and right auricle is equally oxygenated to the blood received from lungs to left auricle.

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Tmg enoch
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Tmg enochLEVEL 14
Asked: August 20, 2020In: Physics

A body is vibrating with simple harmonic motion of amplitude 15 cm and frequency 4 Hz . Calculate the maximum value of acceleration and velocity .

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  1. Heman LEVEL 18
    Added an answer on August 27, 2020 at 11:07 am

    Given , Amplitude of vibration (A) = 0.15 m Frequency of vibration (f) = 4 HZ Maximum value of acceleration (amax) =? Maximum value of velocity (vmax) = ? we have , vmax = ωA = (2πf)xA = (2πx4) x0.15          = 2πx4x0.15 =3.77/s amax = ω2A = (2πf)2.A =(2πx4)2x0.15 = 94.75m/s2

    Given ,
    Amplitude of vibration (A) = 0.15 m
    Frequency of vibration (f) = 4 HZ
    Maximum value of acceleration (amax) =?
    Maximum value of velocity (vmax) = ?
    we have ,
    vmax = ωA = (2πf)xA = (2πx4) x0.15
             = 2πx4x0.15 =3.77/s
    amax = ω2A = (2πf)2.A =(2πx4)2x0.15 = 94.75m/s2

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Leo rush
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Leo rushLEVEL 6
Asked: January 18, 2021In: Biology

What is anthrophobia?

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  1. Shyam Stha LEVEL 9
    Added an answer on January 18, 2021 at 7:34 pm

    The fear of flowers is known as anthrophobia.

    The fear of flowers is known as anthrophobia.

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Question BankLEVEL 1
Asked: December 21, 2020In: Computer MCQs

Which among the following is a term representing unit ofdata storage in computer memory?

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A) Pixel B) Decimal C) Octet D) Point

A) Pixel
B) Decimal
C) Octet
D) Point

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  1. knowithere LEVEL 21
    Added an answer on December 24, 2020 at 8:01 am

    Option C is the correct answer!!! Octet is a term representing unit of data storage in computer memory.

    Option C is the correct answer!!!
    Octet is a term representing unit of data storage in computer memory.

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Tmg enoch
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Tmg enochLEVEL 14
Asked: August 8, 2020In: Biology

write the function of coralloid root

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  1. Heman LEVEL 18
    Added an answer on August 14, 2020 at 11:33 pm

    Function of coralloid roots are : It supply nitrogen to the bacteria which is required for the growth and development of the plant . It is negatively genotypic roots that contain nitrogen fixation .

    Function of coralloid roots are :

    • It supply nitrogen to the bacteria which is required for the growth and development of the plant .
    • It is negatively genotypic roots that contain nitrogen fixation .
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