Though some bacteria cause disease and illness in humans, the majority are harmless. some bacteria are used to aid digestion, used in preparation of certain foods, used to battle infections or used by industry. bacteria have many important roles in nature. all but one is a role of bacteria out in the world around us. a) some bacteria increase the soil fertility. b) bacteria carry out 60% of total nitrogen fixation in natural ecosystems. c) bacteria are responsible for converting sunlight into usable chemical energy. d) bacteria decompose organic matter, by decay and putrefaction, to keep our earth clean.

a

explanation:

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.