OPTIONS:
a. Water from the late was not tested for other possible pathogens b. Residents of other nearby towns were not tested for the bacteria c. The residents' genetic predisposition for getting ill was not determined d. Other sources of drinking water were not tested for bacteria
Answer:
d. Other sources of drinking water were not tested for bacteria
Explanation:
The source of error in the experimental design of the students stems from the failure to collect samples from other sources of the town's drinking water. The samples collected and tested were simply unrepresentative of the drinking water supply of the town, as the samples collected only represented water from the lake, which is 80% of the town's supplies of drinking water.
To arrive at a good conclusion, samples collected should represent adequately, all sources of drinking water of the town, rather than just representing supply from mainly the lake, which accounts for 80%.
It could be that the source of bacterial infection might emanate from other sources of drinking water that was not represented in the samples collected for testing.
B)The chest cavity expands and grows larger
C)The diaphragm relaxes and moves upward
D)The lungs contract and expand
Answer:
The answer is C.
Explanation:
When you breathe out or exhale, your diaphragm relaxes and moves up into your chest cavity. As the space in your chest cavity gets smaller, the air rich in carbon dioxide is forced out of your lungs and windpipe, and then out your nose or mouth.
A) Each bird evolved a deeper, stronger beak as the drought persisted.
B) Each bird's survival was strongly influenced by the depth and strength of its beak as the drought persisted.
C) Each bird that survived the drought produced only offspring with deeper, stronger beaks than seen in the previous generation.
D) The frequency of the strong-beak alleles increased in each bird as the drought persisted.
Answer:
The right cerebral hemisphere controls movements on the left side of the body.