Protists are a collection formed up of protozoa, unicellular algae, and fungus forms. We will focus on the being part of this society: the protozoa (proto = first, zoa = beings). Protozoa are the earliest discovered collection of heterotrophic living that utilize and modify complicated meal particles into power. Although protozoans are only made up of a single cell, these organisms control to perform all the necessary responsibilities of life. The protozoa are split into four principal associations: the ciliates, the flagellates, the heliozoans, and the amoebas.
Protists are the kingdom that includes unicellular organisms. These organisms are eukaryotic in nature which means that it has a well-defined nucleus. They may be present in colonies or biofilm. But they re self-sufficient. Since the time of formation of these organisms, they have constantly undergone evolution forming a more complex type of organisms.
<u>The first protists appeared during the proterozoic age at about 1.8-1.5 billion years back</u>.
Hence <u>the most appropriate answer is 1.5 billion years ago i.e option (C)</u>
<span>Psychologists need to decide how they will MEASURE the phenomenon they are interested in so that they can describe that phenomenon.
Psychologists scientific method to collect data that they need to measure. They use this method because it is the most accurate and most commonly used technique in data collection. </span>
One way global warming can be beneficial is by making hotter days and more heat waves appear, and global warming can be detrimental to changing temperatures in the oceans, affecting animals.
