I believe it is Organic matter is decayed in the soil because plants get their nutrients from animal waste and dead organisms.
Answer:
Unvaccinated person has naturally immune , cannot catched by this disease.
Explanation:
The white blood cells can recognise that these are not human protein . The invading or foreign protein is called an antigen . Antigen in the blood
starts the white cells making defence chemicals called antibodies. Some antibodies break up the antigens . This stops the antigen entering the body cells & makes it easier for the Phagocytes
to egulfs and digest antigens/pathogens & also
Lymphocytes produce antibodies to destroy pathogens.
Some bacteria produce toxins inside the body ,
Our white blood cells can also make antitoxins to
destroy the poison .
Antibodies and antitoxins help prevent microbes damaging the body . The help us fight off the. disease , giving us IMMUNITY to the disease.
Answer:
Black
Explanation:
In the mouse a certain colorless pigment precursor exists.
- If the B allele is present: precursor is converted into black pigment.
- If the genotype is bb: albino
In addition:
- If the A allele is present: black pigment is converted to brown pigment
- If the genotype is aa: black pigment is not converted and mouse remains black
If the mouse has a genotype aaBB, the colorless pigment is converted to black (because there is at least one B allele) but the black pigment cannot be converted into brown (because there's no A allele), so the mouse will have black fur,
Answer:
D- The effect of drift on average fitness is not predictable
Explanation:
Genetic drift is a mechanism causing change in allele frequencies in a population from one generation to another. Genetic drift happens by random sampling and the benefit or harm of the allele is not a factor in deciding which allele stays and which is deviated from.
A beneficial allele may be lost, and a harmful allele fixed into the next generation. Genetic drift affects both small and large populations but its effect is more pronounced in small populations.
Since Genetic drift happens by chance and any allele can be selected, the effect of the drift on the fitness of the population cannot be predicted. If a harmful allele is selected, there will be a negative effect on the fitness. On the other hand, if a beneficial allele is selected, there will be a positive effect on the fitness of the population
During Mitosis and Meiosis, the both cells undergo a DNA replication process which ensures that the cells produced will have the same characteristics as the parent cell. The chromosomes then gather on the center then this is where the two cells divulge. Meiosis produces four haploids and Mitosis produces two daughter cells.
