Katherine wants to investigate if the time of day a plant is watered affects the growth of the plant. She waters the same type of plants with the same amount of water at the same time in the morning. The plants are sitting in the same location and get the same amount of sunlight. Which variable is missing from the experiment?

Katherine wants to investigate if the time of day a plant is watered affects the growth of the plant right? If she waters the plants at the same time she is not doing the experiment. Although she has the same type of plants, the same amount of water, same location and same amount of sunlight for each of them, how is she going to find out what she needs to if she doesn’t water them at different times?

Suspension typei

the glands which are associated with each description is given below:

pancreas - is an endocrine and exocrine gland that secretes juices with enzymes for digestion. salivary glands- with protection and digestion in the mouth. liver- secretes bile for digestion.   lachrymal glands - secrete tears to moisten eyes and protect them from particles and infection.   sweat gland -regulates water, salt, and temperature. oil glands - to form a protective barrier on the skin.   goblet cells - secrete mucus for protection.