Not (A) because a molcule with pH 7 is neutral eg, water
Not (B) because a molecule with pH >7 is basic/alkali which is the opposite of acid.
This leaves C and D.
Lets take one of the most commonly known acids, hydrochloric acid which has the formula HCl.
When acids are added to water they split up (dissociate).
HCl cannot split to give hydroxide ions but can give hydrogen atoms (which are actually hydrogen ions > H+)
so the answer is D
Answer:
These changes probably would have taken place because of antigenic shift or to a smaller extent because of antigenic drift. The antigenic shift takes place when the segments of the influenza viral genome recombine in various ways, and this leads to major modifications to the proteins present on the surface.
The individuals generally do not possess immunological memory to this novel strain of the virus, thus, the disease that they encounter can be more extreme in comparison to the infection with strains to which they possess certain immunological memory. The antigenic shift can result in influenza pandemics.
To stay healthy, humans must maintain homeostasis at the molecular and cellular level as well as throughout the tissues, organs and systems of the body.
The answer is B. a nucleus.
Prokaryotic cells do not have a nucleus. They have ribosomes, a cell membrane, a cell wall, and DNA, but lack a nucleus. Prokaryotes also don't have mitochondria or chloroplasts and generally lack organelles.
1. The allele
frequency of the dominant allele ---P
2. The allele
frequency of the recessive allele ----Q
3. Percentage of
homozygous dominant individuals (AA) ----p2
4.Percentage of
heterozygous individuals (Aa) ----2pq
5. Percentage
of homozygous recessive individuals (aa) ----q2
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