Male gametes are flagellated in

Due to the Doppler effect,the shift in wavelength observed is $0.1 \ \mathring{A}$ for a star producing a wavelength of $6000 \ \mathring{A}$. The velocity of recession of the star will be ...... $km/s$.

$X -$ In deep-sea hydrothermal vents,the average temperature is significantly higher than $25$ to $30^{\circ} C$.
$Y -$ Reptiles and amphibians are ectotherms (poikilotherms),not eurythermal.

In the given branch $AB$ of a circuit, a current $I = (10t + 5) \, A$ is flowing, where $t$ is time in seconds. At $t = 0$, the potential difference between points $A$ and $B$ $(V_A - V_B)$ is......$V$.

Which of the following processes occur during cell division?

In carbon monoxide $(CO)$,how are the carbon and oxygen atoms bonded?