By the end of this lab, you will see how some materials diffuse through a semipermeable membrane but others do not. the materials that you examine will differ in molecule size. some will be larger and some smaller. formulate an investigative question for this situation
here is a picture of my work.
are these strong bases, neutral, strong acids, weak acids or weak base household bleach (ph=12.6) fluid in a car's battery (ph of less than 1.0) milk (ph=6.7) stomach contents (ph=2.2) pure water (ph=7)
ask for details followreport by jfarley259 2 hours ago
household bleach (ph=12.6)= strong base
fluid in a car's battery (ph of less than 1.0) = strong acid
stomach contents (ph=2.2)=strong acid
pure water (ph=7) =neutal
it is the red blood cells
the diagram for evolution of plants in the 4 stages is attached below.
the plants evolution has 4 main periods:
a. 1st period of plant evolution
about 420 million years ago, plants evolved from algae. formation of cuticle was the first terrestrial adaption.
b. 2nd period of plant evolution
abut 400 million years ago, the diversification of vascular plants came into being. the early vascular plants lacked seeds.
c. 3rd period of plant evolution
this was around 360 million years ago, that the seed evolved. the plants had seeds, but they did not have any covering, so they were called naked seeds. these plants were gymnosperms.
d. 4th period of plant evolution
this was the evolution of flowering plants, happened around 130 million years ago (during early cretaceous period). the flowering plants were called angiosperms.