Answer:
Robert Hermann Koch was a physician, he gave 4 postulates on relationship between disease and their causative agent.
Explanation
Kochs pastulates are as follows-
- Causative agents /microorganism always present in diseased individual, but should not present in healthy one.
- These causative microorganisms can be isolated and cultured.
- That cultured microorganism again can cause disease if transferred into healthy individual, and again can be reisolated and cultured.
- Reisolated microorganisms from this diseased individual will be same and identical as cultured and isolated from previous diseased individual.
Answer:
Repetition: Doing something over and over/doing something repeatedly
Replication: Duplicating something/duplicating yourself
Explanation:
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1- to 4-year-old age group experiences the highest overall injury rate for any age group under the age of 15.
More children die from unintentional accidents each year than from any other cause. The rates of unintentional injuries are generally higher among male teenagers aged 15 to 19 years, youngsters from low-income homes, and people of colour. In remote locations, some injuries also happen more frequently.
Although these demographic risk factors cannot be changed, environmental and behavioural dangers, such as dangerous driving, drinking while intoxicated, swimming pools that are not fenced in, and homes without smoke detectors, can be successfully changed with the right techniques.
The three most frequent unintentional accidents that resulted in fatalities among children aged 0 to 19 in 1996 were drowning, motor vehicle occupant, and pedestrian injuries. Although rates varied, these mechanisms together accounted for more than half of all unintentional injury deaths among children and teenagers.
It illustrates the cycling of matter, just like in a natural ecosystem.
Option D.
<h3><u>Explanation:</u></h3>
The natural stable ecosystem is defined as the ecosystem which has the members doing their part of job and each and every member contribute to the stability of the ecosystem by completing food chains.
Here in this bottle ecosystem the boy put the stones, rocks, water which gives proper nutrition to the growing plants and animals which are also introduced by the boy. The plants produce oxygen and consume carbon dioxide whereas the animals consume oxygen and produce carbon dioxide. Thus the cycle is maintained and stability is achieved.
By late 1920s most alcohol was made at home. Alcohol was made at home is the illegal
'stills' because deaths from purposely poisoning alcohol went up from 98 in
1920 to 760 in 1926. The homemade
alcohol was known as moonshine.
