38. A student wants to test the hypothesis that catalysts speed up chemical reactions. She decides to use beef liver since she knows that the liver contains catalysts that speed up chemical reactions in mammals. She sets up her reaction tubes as follows: test tube 1 has the
reaction chemicals and no liver. Test tube 2 has liver but no reaction chemicals. Test tube 3 has the reaction chemicals and a small piece
of liver. She observes the following: (1 point)
Test Tube 1 Small gas bubbles form
Test Tube 2
No reaction
Test Tube 3 Vigorous bubbling, test tube hot

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.  

can i have a list of the items?

vegtables oil and potato oil

fossils prove the small changes in structure.