Which of the following steps has not yet been accomplished by scientists studying the origin of life? a) synthesis of small rna polymers by ribozymesb) abiotic synthesis of polypeptidesc) formation of molecular aggregates with selectively permeable membranesd) formation of protocells that use dna to direct the polymerization of amino acidse) abiotic synthesis of organic molecules

answer: land bridge theory. land bridge theory held that shifting portions of dry land explained the finding of identical species on different continents. plate tectonic theory eventually eliminated the land bridge theory.

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explanation: bc blah

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.  

c is the correct answer hope this !