Which organ performs the major role in excreting wastes from the body?

The answer is kidneys. The organ excretes excess water and ions from the body, urea from deamination of proteins removes toxic substances broken down by the liver. The nephrons are the basic units of the kidney. In addition, kidneys are significant in hormonal regulation  and maintenance of blood pressure.

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.  

voluntary muscles are controlled by the cerebellum.