DNA is organized into chromosomes. The organisms genome is the DNA in all their chromosomes.
During meiosis, the process that creates eggs and sperms, homologous chromosomes line up and recombine, meaning their sequences get mixed up together to form new chromosomes. One of each of these new chromosomes is independently assorted into daughter cells, so that each egg and sperm contain only one chromosome necessary (1n). When the sperm combines with the egg, the zygote (new organism) contains a copy of a homologous chromosome from each parent (2n).
A.Zygomatics doesn't belong with the list of organelles
As a main sequence star nears the end of its life, it begins to grow or swell, using every last bit of stored hydrogen and helium for energy. As it does this, it begins to collapse on the inside. This either causes a supernova as it explodes from the stress, a black hole if it collapses on itself or the red giant will just decrease into a small, white dwarf.
As the star swells into a cooling red giant, the planets around it will burn, if not get sucked into the star by gravity. It's an, unfortunately, inevitable fate.
50.3 g
Explanation:
Start by converting the number of molecules of methanol to moles by using Avogadro's constant.
9.45
⋅
10
24
molecules CH
3
OH
⋅
Avogadro's constant
1 mole CH
3
OH
6.022
⋅
10
23
molecules CH
3
OH
=
15.69 moles CH
3
OH
Now, in order to go from moles to grams, you need to use the molar mass of the compound, i.e. the mass of exactly
1
mole of methanol.
Use the molar mass as a conversion factor to get
15.69
moles CH
3
OH
⋅
32.04 g
1
mole CH
3
OH
=
50.3 g
−−−−−
The answer is rounded to three sig figs, the number of sig figs you have for the number of molecules present in the sample.