Which variable stars have pulsation periods between 1.5 hours and 1.2 days?
a. cepheid variables
b. rr lyrae variables
c. protostars
d. quasars

i think the miocene epoch spans the time from 23 million to 12 million years ago.

one is through turgidity. this occurs before ground tissue ( collenchyma

and sclerenchyma cells) become well

developed to give structural support to the plant as it grows bigger. the xylem

tissue (composed of rigid tissue) of the young

plant render this support and also maintaining osmotic turgidity of the surrounding

plant cells.