The correct answer for both blanks is "Sodium".
Sodium ions are necessary in small quantities for some sorts of flora, but sodium as a nutrient is extra usually wanted in large quantities by using animals, due to their use of it for era of nerve impulses and for upkeep of electrolyte balance and fluid stability. In animals, sodium ions are vital for the aforementioned capabilities and for coronary heart hobby and sure metabolic functions.
The build up in the child's ear prevent sound from reaching the eardrum.
Answer:
I think it's B not sure though check in Google or read the book
B as asexual reproduction the offspring is genetically identical to the parent
