Answer:
Knee joint.
Explanation:
The knee joint is a freely movable joint in the body. Usually allows a slight degree of movement.
Answer:
Hope this helps!
Explanation:
Air is exhaled as the diaphragm relaxes, in combination with other muscles and tissues.
Answer:
D. Crossing over
Explanation:
During prophase-I of meiosis-I, a process of genetic recombination occurs. During this process, two non-sister chromatids of the paired homologous chromosomes exchange a part of the genetic segment. This is called crossing over. Crossing over results in the production of recombinant chromatids that carry new combinations of alleles that were otherwise not present in the parental chromosomes. Therefore, crossing over generates some extra combinations of alleles.
As the pH of a solution increases, deprotonation of the acidic and basic groups on proteins occur,
so that carboxyl groups are converted to carboxylate anions (R-COOH to R-COO-) and ammonium groups are converted to amino groups (R-NH3+<span> to R-NH</span>2<span>).
In proteins the iso-electric point (pI) is defined as the pH at which a protein has no net charge.
When the pH > pI, a protein has a net negative charge and when the pH < pI, a protein has a net positive charge.
The pI varies for different proteins.</span>