"in the experimental setup below, which substance would be used to prove that the gas produced by the yeast in the vacuum bottle could change the ph of the liquid in the flask?
(1)an indicator
(2)a chemical messenger
(3)an enzyme
(4)a salt solution"

each of the 46 original chromosomes splits into two daughter chromosomes, so there are two sets of 46 daughter chromosomes that end up in each cell. human cells have 46 chromosomes. each chromosome consists of a pair of identical chromatids attached together by a structure called a centromere.

enhanced global partnerships and exploration capabilities may advance international preparedness for protecting the earth from catastrophic events such as some asteroid strikes, advancing collaborative research on space weather and protecting spacecraft by developing new means for space debris removal.