The step of the scientific method being described in the example is collecting and observing the data. This is an important part of the experiment, as it is going to be the basis of the analysis and conclusion. This is where the actual application of the hypothesis is going to reflect on. The data noted by the observer should be accurate and genuine.
Answer: Catabolic inhibition techniques of operons for utilization of different sugars may differ among various strains of yeast, thereby favoring initiation of transcription in one yeast strain over another depending on the sugar.
Explanation:
Answer:
(b) Oil floating on the surface of water can coat the feathers of birds and marine animals.
Answer: The option that contributes to the ease of transmission is 2 ( Low infectious dose).
Explanation:
Giardiasis is an infection that affects the intestine which is caused by a parasite known as giardia intestinalis. The giardiasis surveillance data recorded by the CDC, was done to educate public health practitioners and health-care providers about the scope and magnitude of giardiasis. It also provided different route through which the parasite can be transmitted to uninfected individual and these include:
--> Waterborne transmission: In this route of transmission, an individual becomes infected when they drink contaminated water from recreational water(pools) or streams.
--> Foodborne transmission: In this route of transmission, an individual becomes infected when they eat contaminated uncooked foods or foods that become contaminated after cooking.
--> Person to person: in this route of transmission, a healthy individual becomes infected through ianal sex practice.
The LOW INFECTIOUS DOSE of the parasite contributes to the ease at which transmission occurs through the above mentioned routes. The parasite has a two stage life cycle, the trophozoite and cyst. Ingestion of as few as 10 cysts can lead to giardiasis Infection.