Plant cells<span> have a </span>cell<span> wall, chloroplasts and other specialized plastids, and a large central vacuole, which are </span>not found<span> within </span>animal cells<span>.</span>
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The name of the species that eliminated the wolves in Yellowstone so that they had to be reintroduced is <u>humans</u>.
In the olden times, people were unaware about the importance of natural ecosystems and the worth of each organism being part of an ecosystem. An expansion in an area caused the wild predators to come close to domestic livestock during the 1800's. The wolves began using these domestic animals as a source of nutrition. The humans, in order to protect their livestock, killed wolves.
It was as late as the 1970's when efforts started to being made to protect endangered species. These efforts caused the reintroduction of the wolves in Yellowstone.
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If a biologist is measuring diversity by calculating the proportion of individuals of each species, he or she is actually calculating the species evenness of species in the community.
<h3>What is species evenness?</h3>
- When there is an environmental gradient in the study region, systematic sampling is performed.
- To take systematic samples along the environmental gradient, a transect is utilized.
- A population is a collection of creatures belonging to the same species that coexist in a certain location.
- Within a given area, more than one population may exist.
- It's possible for populations of Saguaro cacti, Cactus Wrens, and Bark Scorpions to coexist in the same places.
- A population is a collection of people belonging to the same species who are present in the same location at the same time.
- All of the people in all of the interacting populations in a given area make up a community.
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