Primary succession is when, for example, a volcano explodes and there is nothing left and even the soil is ruined. It would take at least a hundred years for the land to be like it was before the volcano erupted. Secondary succession is when, for example, a wild fire happens but the soil is not ruined. It would take at least 25-50 years for the land to be like it was before the fire.
Answer:
here.
Explanation:
Due to the prevalence of malaria in Africa, the allele for sickle cell anemia (HbS) provides a selective advantage. That's why it remains in the population.
A normal African person (HbAHbA), with normal haemoglobin, will not die of anemia, but will die of malaria.
An African person with sickle cell anemia (HbSHbS), with abnormal haemoglobin, will die of anemia.
A heterozygous African person (HbAHbS), with half of his red blood cells (RBCs) being normal and the other half being sickle-shaped, will neither die from anemia, nor malaria since the plasmodium will be incapable of completing its life cycle in the abnormal RBCs.
Thus heterozygous African people will grow, reproduce and pass on the HbS allele to the next generations.
It is number 1 because enzymes are always being consumed.
Answer:
$55,400
Explanation:
To determine the cash paid for salaries and wages during the year.
wages payable (beginning of the year) = $800
wages payable (end of the year) = $2600
Income statement on wages and salaries for the year = $57,200
cash paid for Salaries and Wages during the year = (Salaries and Wages Expense + wages payable at the beginning of the year) - wages payable at the end of the year
$(57,200 + 800) - $2600
$(58000-2600)
= $55,400
