True.
<span>The trachea is about 10 cm long and it has an approximate diameter of 2 cm. It is located anterior to </span>(in front of) the esophagus and posterior to (behind) the isthmus of the thyroid. The right and left main bronchi are branches of the trachea. This division occurs at the level, or just below the level, of the sternal angle, also known as the manubriosternal joint.
Answer:Margulis
She is the one who discovered it
Question is incomplete i have added full question in ask for detail section as well as in picture format with answer. See figure for clear explanation.
Answer:
(Twisted leaves)
The mutant allele is dominant to its corresponding wild-type allele
(Forked leaves)
The mutant allele is dominant to its corresponding wild-type allele
(pale leaves)
The mutant allele is neither dominant nor completely recessive to its corresponding wild-type allele
Explanation:
I have attached picture which explains phenomenon it self.
Answer:
Virus are small infectious particles which act as intracellular parasites. They are considered non-living when they are present outside their host because they show no metabolism outside.
They do not have even cellular level of organization and are basically just packages of nucleic acid and protein. Still, virus have some important features which are common with cell-based life like the presence of nucleic acid as their genetic material.
Apart from the presence of genetic material they also have the ability to evolve like the cell-based life. This evolution allows them to be selected naturally and produce more offspring.