Occasionally three polar bodies are found clinging to the mature ovum. one came from an unequal division of the ovum, but from where did the other two arise?
a) there were originally four polar bodies and one disappeared.
b) what you really see are two polar bodies and the sperm that will fertilize the egg.
c) one is an undeveloped primary oocyte that failed to mature.
d) the first polar body has also divided to produce two polar bodies.

Amass attached to a spring is displaced from its equilibrium position by 5cm and released. the system then oscillates in simple harmonic motion with a period of 1s. if that same mass–spring system is displaced from equilibrium by 10cm instead, what will its period be in this case? a mass attached to a spring is displaced from its equilibrium position by and released. the system then oscillates in simple harmonic motion with a period of . if that same mass–spring system is displaced from equilibrium by instead, what will its period be in this case? a) 0.5sb) 2sc) 1sd) 1.4s

Aheavy piece of hanging sculpture is suspended by a90-cm-long, 5.0 g steel wire. when the wind blows hard, the wire hums at its fundamental frequency of 80hz. what is the mass of the sculpture?

Ascientist wants to test ways to reduce pollution in lake . what is the bestway of doing this