When an individual muscle fiber receives a threshold stimulus, it contracts as much as possible. ... a threshold stimulus is the minimum amount of energy needed to make a muscle fiber contract.
Boron has a smaller radius and the protons in carbon exert a greater pull
Take in energy from the sun and convert that energy into chemical energy
ascon type of canal system is the one with the flagellation spongocoel. it is the simplest type of canal system. in this type of canal system water enters through ostia into spongocoel and excrete through osculum sponge with ascon type of canal system is called as asconoid sponge leucososlenia
