When two protein chains combine to form an active protein, the structural level is quaternary.
<h3>What is a quaternary structure?</h3>
The quaternary and tertiary structure of a protein is the tridimensional shape of the protein, which involves protein domains.
The quaternary protein structure refers to the different arrangements generated by different protein subunits.
The primary structure of a protein involves its amino acid sequence, whereas the second structure involves protein chains.
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The first is plant
Second is animal
Third is fungi
Era is used to mark the boundaries of geological time scale by using radio carbon dating technique.
Explanation:
Geological time starts with Precambrian time.
Geologically, time is divided between the Precambrian era and present time into era.
The three eras are Paleozoic era, Triassic period and Cenozoic era.
Era is further divided into periods.
Scientists use radio carbon dating to study fossils and rock formation. With this study they were able to divide them in exact geological scale.
Geologic scale is the record of events in earth's history and evolution.
Answer:
I think bacterial cell becausea microscope look into small organisms that we can't see with a naked eye
Flood, mud slides, wind/flying objects.
1. evacuation plans. which include knowing all routes out of the hurricane zone and the means of evacuating (car) are fully prepared.
2. clean out and unblock all paths to and by the drains. Also report all drains that are clog to the city.
3. keep emergency food and water. as well as first aid. you should also have any personal medicine well stocked as well.
