Explanation:
Meiosis produces haploid gametes (ova or sperm) that contain one set of 23 chromosomes. When two gametes (an egg and a sperm) fuse, the resulting zygote is once again diploid, with the mother and father each contributing 23 chromosomes.
Answer:
The correct answer is : A.
Explanation:
- This is because of the following reasons:
- Escherichia coli is a bacteria and hence is a prokaryote.
- The cloning of human (eukaryote) genes is done to obtain in-vitro protein expression which are to be used a pharmaceutical compounds.
- Although the phenomenon of Central Dogma takes place in both Prokaryotes and Eukaryotes, the mechanism is very different.
- Some of the differences includes:
- Eukaryotic genes contain certain non-protein encoding sequences called the Intron sequences which needs to be removed from the transcribed mature mRNA by Spliceosome. This phenomenon is absent in prokaryotes as they do not possess introns. Hence, proper processing of eukaryotic mRNA is not possible in prokaryotes.
- The mature eukaryotic mRNA has a 5' cap and 3' polyadenylated tail which is added by a capping enzyme and a poly-A polymerase enzyme to increase their stability. This will not be possible in a prokaryote as they lack these enzymes.
- The translation of membrane proteins and secretory proteins is carried on by the ribosomes bound to the endoplasmic reticulum. This structure is absent in prokaryotes, hence they will be unable to produce a proper polypeptide sequence.
- Finally, the eukaryotic proteins undergo various modifications after formation, like methylation, acetylation, etc. These reactions cannot be carried out in a prokaryote as they lack the respective enzymes.
- Hence, we see a properly folded functional eukaryotic protein cannot be produced in a prokaryote.
Answer:
Herpetophobia is a fear of reptiles. People with herpetophobia are most often afraid of reptiles like snakes and lizards. ... If you have a specific phobia, you feel an overwhelming sense of fear or anxiety about something. There are many different types of specific phobia.
Explanation:
Breaker waves are waves that reach a specific amplitude that causes certain energy transformations. They are formed due to the rise of the ocean floor.
<h3>What are breaker waves and their formation?</h3>
A breaker is a type of wave that is formed due to the rise of the ocean floor or the bed in the oceanic zones. They reach the shores towards the shallow water because of the water breaking or collapsing.
The breaker waves have increased heights when the water depth and wavelength decreases. It is called a breaker because it breaks something.
Therefore, option A. the rise of the ocean floor cause the formation of the breaker wave.
Learn more about breaker wave here:
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