Answer:
The 2 processes that occur in meiosis to create genetic diversity are <em>crossing over and independent assortment.</em> <em>Crossing over is when exchange of DNA segments occurs between homologous chromosomes. Independent assortment is when homologous chromosomes assort independently into gametes. </em>
Explanation:
Meiosis can be described as a process of cell division through which four daughter cells are produced having half the number of chromosomes as the parent cell.
During this process, the phenomenon of crossing over and independent assortment occurs which allows for the genetic diversity which we see in organisms of a species.
During Prophase 1 of meiosis 1, homologous chromosomes exchange segment of DNA between them which leads to genetic diversity.
During Anaphase 1 of meiosis 1, homologous chromosomes move to each side of the cell and the chances of the gamete to receive any of the chromosome is random.
Answer:
It's B
I got it right on Edgenuity
<span>The nucleolus is the structure within the nucleus of eukaryotic cells. It consists of RNA, DNA, and proteins. The nucleolus is involved in ribosome biogenesis which results in the synthesis of ribosomes. Ribosomal RNA (rRNA) is transcribed from DNA in the nucleolus. rRNA is processed into three mature RNAs and together with proteins form ribosomal subunits. After subunits form the ribosomes, they are transported out of the nucleus to the cytoplasm where they take place in translation.</span>
1. Nothing he is a lie
2. B.
3. Nothing is an advantae.
4. c
5.d
Answer:
Sodium-Potassium pumps (proteins that help neurons generate electricity) are produced by ribosomes on the rough endoplasmic reticulum (ER).
Explanation:
Sodium-Potassium Pump (NA+/K+):
The Na+/K+ Pump is a transmembrane channel protein, responsible for maintaining the concentration gradient of sodium and potassium ions in the intra and extracellular environment. This is achieve by pumping 3 Na+ outside and 2 K+ inside the cell at the cost of one ATP. In neurons, these channels help in generating an action potential across the cell membrane that gives rise to a nerve impulse.
Production of Transmembrane proteins:
All membranes and their proteins are produced by the ribosomes on the rough ER. The rough endoplasmic reticulum contains the enzymes required for lipid synthesis; and as cell membranes are made of lipids, the ER is the most suitable location for synthesis. Membrane proteins, particularly, transmembrane proteins like the Na+/K+ pump possess hydrophobic surfaces that don't dissolve in the cytoplasm but readily attach to the ER surface from where they can be transported wherever required.
