Which state of water concentration is healthiest in an animal cell? A. Isotonic
OB. Hypertonic
C. Equitonic
D. Hypotonic

What causes the phospholipids to organize themselves the way they do

Vaccines are weakened forms of disease causing microorganisms, which are given to patients to prevent disease. after the vaccine is administered, the immune system responds by creating a(n) to recognize the a.) antibody, antibiotic b.) antigen, antibody c.)antibiotic, antibody d.)antibody, antigen

How far down have geologists drilled holes ? (science) a: 3.8 km b: 12 km c: 100 m d: 1200 km