Answer:
These homologous structure indicates a common ancestry
Explanation:
When 4 organisms show homologous structures, they indicates they belongs to a common ancestor from where the changes takes place in them.
The organs which are structurally dissimilar but functionally same are called as homologous organism.
CENTRAL NERVOUS SYSTEM INCLUDES THE BRAIN AND SPINAL CORD.
Answer:
c. the specific geographical location where an organism lives.
Explanation:
The ecological niche of an organism includes the habitat where it lives and its place in the community with respect to the other species. It includes various adaptations present in the organism to survive in prevailing conditions, its interaction with other biotic factors of the system, and the pattern of consumption of available resources. Therefore, the ecological niche of an organism defines the space occupied and its functional role in the community irrespective of the type of biome. It does not take account of its geographical location on the earth.
Mitosis is a type of cell division which results in two daughter cells which have the same number and kind of cells as the parent nucleus. Mitosis is used to replace worn out cells and for growth. In plants, a new cell was is built between the daughter cells, while in animals the cell membranes constrict and pinch the parent cell into daughter cells.
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