What exactly is species evenness?

Species evenness refers to how close in numbers each species in an environment is.

Explanation: For example, let's say there are 15 elephants, 60 zebras and 5 lions on our first sample. The sample from the second states 35 elephants, 25 zebras and 20 lions. The total of both sample 1 and sample 2 become 80. Sample 2 is relatively more evenness than sample 1 . This is because the total number of animals in the sample is quite evenly distributed between the 2 samples. This environment  is not very even though. Species richness is a measure of the number of different kinds of organisms present in a particular area. Evenness compares the similarity of the population size of each of the species present as I mentioned above.

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the cell theory states that all living things including animals, as well as plants, are made of cells.

answer: angiosperms

dicots

angiosperms are highly evolved plants, they produce seeds which are enclosed within in a carple. these are the largest group of plants on earth. they include trees, shrubs, herbs and small flowering plants. angiosperms exhibit a flowering stage in their life cycle. the flower serves the function of reproduction and fruit formation in majority of angiosperms. dicot is the term used to describe flowering plants that have two seed leaves. dicots are plants which develop seeds which split into two parts called cotyledons. each cotyledon contains one embryo.

here, a small purple flower development indicates that the plant belongs to angiosperms and having two embryonic leaves indicates it belongs to dicots.