Question

a student would like to do an experiment to see how light can affect the growth of a plant. the student looks up different lab procedures on the internet and would like to combine the procedures to make a better set of procedures. read the table below to compare both lab procedures. procedure a step 1. plant 1 soybean in two identical pots with the same amount of soil and label them \plant 1\ and \plant 2\. step 2. add water to \plant 1\ every other day. step 3. place both pots in a sunny window. step 4. use a ruler to measure both plants each day. step 5. record your results in your notebook. step 6. continue measuring for 35 days. procedure b step 1. using two identical pots filled with the same amount of soil, plant 1 soybean in a pot and label it \plant 1\ and plant 1 tomato seed in a pot and label it \plant 2\. step 2. add the same amount of water to both plants every 3 days. step 3. place plant 1 in a sunny window and place plant 2 in an area with less than 2 hours of sunlight each day. step 4. use estimation to see which plant grows more each day. step 5. record your results in your notebook. step 6. continue measuring for 35 days. what is the best procedure for step 2? a. add water to \plant 1\ every other day. b. add the same amount of water to both plants every 3 days. c. use two identical pots filled with the same amount of soil, plant 1 soybean in a pot and label it \plant 1\ and plant 1 tomato seed in a pot and label it \plant 2\. d.

Explanation:

The experiment aims to study the effect of light on plant growth. Procedure A has two soybean plants with same - soil amount, watered and placed in sunny window, and measured daily. Procedure B has a soybean and a tomato plant with same soil amount, watered, one with less sunlight. To best study light effect, plants should be of the same type and only light should vary. Procedure A is better as it has two plants of the same type in different light conditions (implicit as one is the control).

Answer:

A