Advertisements for a new energy drink claim that it helps people concentrate, and you are designing an experiment to test the hypothesis that the energy drink improves concentration. A large group of study participants are going to come to your lab and take a concentration test. Now you must choose independent and dependent variables for your experiment. What would be an appropriate independent (treatment) variable for your experiment?
A) How much caffeine (from all sources) participants have consumed the day of the test
B) How much of the energy drink participants report drinking in the last month
C) How well the participants can concentrate during the test
D) How much of the energy drink participants are instructed to drink right before the test

D)

Explanation:

Because the independent variable stays the same for all the people in the experiment

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.