In a paper on photosynthesis in a desert cactus in which section would you find a review of existing knowledge that is relevant to the experiment?
a. conclustion
b. materials and methods
c. introduction
d. results

The introduction of a paper usually contains the review of existing knowledge of photosynthesis

Option C

Explanation:

Among this the materials and methods contain a protocol of all experiments that are to be done during a study. The results deals with the results we got from the experiment and the discussion deals with the detailed interpretation of the result. Whereas the introduction deals with the previous study that has taken place.

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.