Why is not any one parameter good enough to demonstrate growth throughout the life of a flowering plant?

A scientist is studying the effect a new fertilizer has on the root growth of bean seedlings. Three groups of plants are grown in the same location in a greenhouse, each receiving the same amount of sunlight and water every day. The scientist measures the length of the roots for each plant every day. The scientist then calculates the mean for each group for five days. The results are shown in the following table. Fertilizer Experiment Data Table A What is the independent variable in this experiment? B с Day 1 Day 2 Day 3 Day 4 Day 5 D Group 1 0 mg 3.0 cm 3.2 cm 3.4 cm 3.7 cm 4.2 cm the amount of water given to each plant the amount of fertilizer given to each plant Group 2 5 mg 2.7 cm 3.1 cm 3.7 cm 4.2 cm 4.6 cm the place in the greenhouse where each plant was placed the type of soil used for each plant Group 3 10 mg 2.9 cm 3.3 cm 3.7 cm 3.9 cm 4.1 cm

What are the two broad cues plants use to determine what an undifferentiated plant cell will become (what are the two broad cues a plant uses for determination)?

You are an amateur gardener and are reading an article that explains that plants need only five basic factors for growth: sunlight, water, air, nutrients, and a substrate on which to grow (soil). You want to investigate the role that these variables play in plant growth.  You decide to test the substrate and see if changing substrate mixes will affect plant growth. Match the following experimental components with their descriptions.    Experimental Components: ( Experimental Variable, Dependent Variable, Control Condition, Independent Variabe, A Confounding Variable That Must Be Held Constant)   1. type of substrate used:   2. growth resulting from substrate type   3. amount of water needed in all plants   4. substrate that is changed during the experiment   5. substrate that is not changed during the experiment