What do both plant and animal cell membranes do

Are salt and soap nutrients or toxins for yeast? explain.

Hummingbirds drink nectar from flowers, while robins eat plant seeds. what does this reduce?

Amylase becomes denatured at a temperature of 80°c. during an experiment to study the effect of varyingtemperature on enzyme activity, amylase’s reactivity with starch was measured at body temperature (37°c), andthen again at an increased temperature of 42°c. how would this increase in temperature affect the experiment