What could be the possible reason for the decrease in the species diversity as we move away from the equator ?

Which muscle moves away the body parts from the body ?

Two bodies moving towards each other collide and move away in opposite directions. There is some rise of temperature of bodies in the process. Explain the reason for rise of temperature and state what type of collision it it ?

A ladder 5m long is leaning against a wall. The bottom of ladder is pulled along the ground, away from the wall, at the rate of 2cm//sec . How fast is its height on the wall is decreasing when the foot of ladder is 4m away from the wall.

Assertion : The acrocentric chromosome has centromere at the terminal position. Reason : The metacentric chromosome has centromere slightly away from the middle of the chromosome.

Assertion : Broadly utilitarian arguments say that we should conserve biodiversity because biodiversity plays a major role in many ecosystem services that nature provides. Reason : Expolration of molecular, genetic and species level diversity to obtain the products of economic importance is include under broadly utilitarian category. (a) If both assertion and reason are true and reason is the correct explanation of assertion. (b) If both assertion and reason are true but reason is not the correct explanation of assertion. (c) If assertion is true but reason is false. (d) If both assertion and reason are false.