The answer is b. the decreased migration of pests and pathogens
Digestion begins in the mouth, well before food reaches the stomach. A digestive enzyme in saliva called amylase (AH-meh-lace) starts to break down some of the carbohydrates (starches and sugars) in the food even before it leaves the mouth.
It is A, sunlight. The variable is the type of light used, and the control is used to measure the effects of the variables, so since sunlight is the normal light, it is the control.
Answer:
a) the seasonal movement of animals between wet- and dry-season pastures the political uprisings that took place in many African nations after they were released from colonial rule the zone of ecological transition between the Sahara to the north and the wetter savannas and forests to the south
Answer:
The proportion 'p-hat' that were cyanobacteria is 0.76
Explanation:
The proportion of cyanobacteria is the relationship between the whole sample and the actual quantity of cyanobacteria found in the sample, that were not other algae. In general, proportions are written as fractions. The<em> numerator is the number of cyanobacteria in the sample, while the denominator is the total number of organisms in the sample</em>.
So, in the exposed example we know that
- The sample was composed of 50 algae
- There were two categories for the sample: algae that were cyanobacteria, and algae that were not cyanobacteria
- Algae that were cyanobacteria = 38
- Algae that were not cyanobacteria = 12
If we want to study the relationship between the sample and cyanobacteria and express it as a proportion, then we need to divide the number of cyanobacteria by the number of algae in the sample. This is
38/50 ----> Fraction expression of the relationship between cyanobacteria
and the sample
0.76 ----> Proportion of cyanobacteria in the whole sample.
