Estuaries are the most productive of all marine ecosystems. They are located where the river meets the sea. The San Francisco Bay is a popular estuary.
<span>Prokaryotic cells and eukaryotic cells reproduce by mitotic cell division. Regardless of the type of cell, all cells must make a copy of their dna before they divide.</span>
True. It's to my knowledge that gas has no smell, so they add this stinky stuff so it can be detected.
Answer:
The correct answer is: a triploid cell.
Explanation:
A triploid cell is the result of the fertilization of a diploid cell and a haploid cell. Triploid cells have 3 sets of chromosomes, diploids have 2 sets, and haploids have only 1 set.
Humans, besides many other species, have diploid cells - one set of chromosomes comes from the mother and the other set of chromosomes comes from the father. <u>In order to maintain this number, </u><u>gametes</u><u> (the sex cells: spermatozoids and oocytes) become haploid through meiosis</u>. This way, when the spermatozoid fertilizes the oocyte, the resulting cell will be diploid.
A gamete being diploid is a result of an <u>error during meiosis</u>, and will most likely generate a triploid cell during fertilization.
A triploid cell, unfortunately, <u>won't be able to survive,</u> so they are almost always spontaneously aborted in the first two weeks of pregnancy.