A diploid (2n) cell is a cell with both set of homologous chromosomes. Meiosis is a type of cell division which occurs in the gamete cells to produce four haploid (n) daughter cells. Haploid (n) cells are cells with one set of chromosomes. In this case a diploid cell in the male (spermatocyte) undergoes meiosis i and meiosis ii to produce four haploid (n) daughter cells .
Covalent bonds are formed when two atoms are able to <em>share</em> electrons.
Iroinic bonds are form when two atoms are <em> </em> electrons from each other to complete the bond. This results in a pair of ions.
<u>Covalent bonds:</u>
- Have a definite shape.
- Have a low melting point.
- At room temperature they are in a liquid or gas.
- They occur between two non-metals.
<u>Ionic bonds:</u>
- Have no definite shape.
- Have a high melting point.
- At room temperature they are solid.
- They occur between a metal and a nonmetal.
A centimeter is much smaller than a meter.
There are actually 100 centimeters in every meter, which means a centimeter is of a meter. Much smaller.
Due to the gravitational pull
There are two hormones that the adrenal medulla is responsible for secreting, and those are:
1. epinephrine, also known as adrenaline
2. norepinephrine, or noradrenaline