3. A researcher did an experiment to test the activity of pepsin, an enzyme 2 points that digests protein in the stomach, and trypsin, and enzyme that digests
protein in the intestine, at various temperature and pH levels. Figure 1
shows the relative rates of pepsin and trypsin activities at various pH
levels. Pepsin is an enzyme present in the stomach, where the pH is usually
3.0. Which of the following best describes the activity of pepsin when it is
introduced into the intestine, which has a pH around 6.0?*

answer; a muscle cell, another neuron and a of the above

i think it would be b. tissue because an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.

1. a tropical dry forest carries out more rapid nutrient cycling

measuring light intensity

light meters can be used to measure light intensity. the meter is held at the soil surface and pointed in the direction of the maximum light intensity, and then the meter is read.

errors can be made when measuring light intensity by accidentally shading the light meter. the reliability of the results can be checked by taking many samples.