External fertilization takes place in
(A) Jelly fish
(B) Sea star
(C) Both (A) and (B)
(D) Reptiles
1 Answers
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Sea divers go deep in the sea water with a mixture of which of the following gases
Correct Answer - A Deep sea divers use a mixture of `O_(2)` and He for breathing.
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Star Fish belongs to
Correct Answer - A Starfish belongs to class-Asteroidea.
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In reptiles, uric acid is stored in ........
In reptiles, uric acid is stored in cloaca.
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A boat moves along the flow of river between two fixed points A and B. it takes `t_(1)` time when going downstream and takes `t_(2)` time when going u
`t_(1)=(AB)/(v_(b)+v_(R)) . T_(2)=(AB)/(v_(b)-v_(R))` or `v_(b)+v_(R)=(AB)/(t_(1))` and `v_(b)-v_(R)=(AB)/(t_(2))rArr 2v_(b)=(AB)/(t_(1)+(AB)/(t_(2)))=AB((t_(1)+t_(2))/(t_(1)t_(2)))` or `((2t_(1)t_(2))/(t_(1)+t_(2)))=(AB)/(v_(b))`= time taken by the boat to cover AB
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A liquid of volume of `100 L` and at the external pressure of `10 atm-Lt` the liquid is confined inside an adiabatic bath. External pressure of the li
Work done `= -100xx-1=100L. Atm` `Delta q=0 Delta w=Delta U` `rArr 100+Delta U` `DeltaH=DeltaU+(P_(1)V_(2)-P_(1)V_(2))` `=100=+(100xx99xx100xx10)` `=100+100xx89=9000 "lit atm"` `1L. atm=101.3"joule"`
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A star is at a distance of `50xx10^(12)` km from earth. If the star disappears due to collision with some other star so that its light is extinguished
Correct Answer - `5.3`years
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A star is moving away from an observer with a speed of `500 kms^(-1)` .Calculate the Doppler shift if the wavelength of light emitted by the star is 6
Correct Answer - Increase of `10Å`
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a. Amphibians and reptiles have a 3 chambered heart with ___atria and ___ventricle. b. heart is ___derived organ and protected by a double walled memb
Correct Answer - a. 2,1 b. Mesodermal,Pericardium c. 3,Tricuspid d. Thicker. e. 72, Pacemaker f. 30% g. Joint diastole h. P i. Coronary j. Decrease, Cardiac output
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Water `rarr` zooplankton `rarr` small fish `rarr` large fish `rarr` fish eating birds In the above food chain If concentration of DDT is 0.003ppb the
Correct Answer - `{:(" Water"),((.003 ppb)),(" "darr),(" "zp),((".004 ppm")),(" "darr),(" sf"),((.5 "ppm")),(" "darr),("LF (2-5 ppm)"),(" "darr),("Birds (25 ppm)"):}`
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There are different fish, monkeys and water of the habitable planet of the star Proxima b. A fish swimming underwater
Correct answer is (B) 5/4
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