Answer:
D. Mass extinction events separate the three eras from each other
Explanation:
The Phanerozoic is an eon, thus it is representative of the largest unit of geological time. It is further divided into three eras. The three eras of the Phanerozoic are the Paleozoic, Mesozoic, and Cenozoic. These three eras have been divided on the basis of mass extinction events. The Paleozoic ends with the mass extinction at the end of the Permian period, which is also the largest mass extinction ever, and it also marks the beginning of the Mesozoic. The Mesozoic ends with the mass extinction at the end of the Cretaceous period, occurring because of a large meteorite or comet impact, marking the beginning of the Cenozoic era. The Cenozoic era is still going, and even though there have been extinction throughout it, none of them has been of a scale big enough to be considered as a mass extinction, so until something like that happens, this era will continue to exist.
<span>Which group of organisms produces energy from sunlight and is also known as blue-green algae?</span> cyanobacteria
Before and after handling food, going to the bathroom, changing diapers, or touching pets, wash your hands with soap and hot water. To clean up spills or kitchen surfaces, use paper towels or clean cloths along with hot, soapy water. Use your washing machine's hot cycle to often wash cloths.
<h3>What is bacterial contamination?</h3>
When bacteria build up on food and make it spoil, this is called bacterial contamination. Eating that food can make you ill, either because of the toxins released by the bacteria or because of the germs themselves. According to bacteria contamination, there are three basic forms of foodborne sickness.
<h3>What is a typical bacterial contamination source?</h3>
The incidence, fate, movement, survival, and multiplication of pathogens in the multiple sites where they are found are all influenced by a number of factors, including contaminated manure, irrigation water, soil, cattle, and wildlife.
<h3>What is the most effective means of preventing biological contamination?</h3>
- Food handlers must always adhere to safe food handling procedures to reduce the danger of biological food contamination and slow down bacterial growth.
- Exclude high-risk foods from the temperature danger zone, such as meat, poultry, shellfish, eggs, and dairy.
- High-risk foods should be properly bought, stored, thawed, prepared, cooked, and served.
learn more about bacterial contamination here
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im thinking its a chemical change cause a new substance is formed
