Answer:
1. Adaptive radiation: A pattern of evolution in which slightly different species evolve from one common ancestor.
2. Coevolution: A pattern of evolution in which two species evolve in relation to each other.
3. Convergent evolution: A pattern of evolution in which similar characteristics evolve between two unrelated species.
4. Divergent evolution: A pattern of evolution in which very different species evolve from one common ancestor.
5. Gradualism: A theory of evolution that states that a species evolves by consistent, small, steps.
6. Punctuated equilibrium: A theory of evolution that states that a species evolves in spurts of rapid change and then no change.
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Answer:
All euglena have chloroplasts and can make their own food by photosynthesis. ... Euglena move by a flagellum (plural ‚ flagella), which is a long whip-like structure that acts like a little motor. The flagellum is located on the anterior (front) end, and twirls in such a way as to pull the cell through the water.
Explanation:
In general, flagellum is a long whip like organ which protrudes to the exterior from the cell body and permits mechanical work without any marked change in the form of the effector cell. In Euglena, there are two flagella. One of them is equal in length to body while other is short.
<h2>Species richness </h2>
Explanation:
Resource partitioning is a type of strategy of coexistence among species which allow species to use natural resources in different ways and it may be temporal or spatial
There are two attributes of a community which will tend to lead to lower species richness in a community:
1) Most species are generalists, utilizing a broad spectrum of resources
: Species that can live in many different types of environments, and have a varied diet are considered generalists
2) Most species are specialists, utilizing a narrow spectrum of resources: Specialists are those species that require very unique resources, these type of species have a very limited diet or need a specific habitat condition to survive
