Correct answer: B). With fewer contractions
The main function of a contractile vacuole is to maintain the sufficient amount of water in the protoplasm of the cell. For the freshwater amoeba contractile vacuole is needed to pump water and maintain a osmoregulation.
But when it is kept in sea water, more contraction is required to expel the water out of the cell in order to make the environment inside amoeba same as of sea water.
Answer:
Phoebus Levene
Explanation:
Since he performed hydrolysis experiments on nucleic acid. He also discovered that DNA is composed as a series of monomers called nucleotide.
There are currently
22 active volcanoes in Luzon
428 in Visayas
and 20 in mindanao