One baby receives an x chromosome from its mother and an x chromosome from its father; it will develop as a a second baby receives an x chromosome from its mother and a y chromosome from its father; it will develop as a

One baby receives an x chromosome from its mother and an x chromosome from its father; it will develop as a _girl. a second baby receives an x chromosome from its mother and a y chromosome from its father; it will develop as a ___boy__.

Explanation: There are 23 pairs of chromosomes in humans. 22 pairs are known as autosomes and one pair of chromosome is sex chromosome. Which is XX in females and XY in males. This pair of chromosome determine the sex of baby. The one with XX is girl and one with XY is boy.

it provides an alternative energy pathway for the reaction to proceed.

a catalyst is a substance that speeds up the rate of a chemical reaction but is not consumed during the course of the reaction.

catalysts increase the rate of reaction without being used up. they do this by lowering the activation energy needed. with a catalyst, more collisions result in a reaction, so the rate of reaction increases. different reactions need different catalysts.

a catalyst works by providing an alternative reaction pathway to the reaction product. the rate of the reaction is increased as this alternative route has a lower activation energy than the reaction route not mediated by the catalyst.