The hypothesis is
<span>If more dry cells are connected end to end, a light bulb will work longer because there is more energy available.
The variables are
the number of dry cells connected end to end
the duration of the light bulb working</span><span />
Answer: Phagocytosis
Explanation:
White blood cells are the very important part of the immune system which has the ability to kill the harmful substances that reach the body.
They patrol like police inside the circulatory system and wipe out the pathogens like bacteria and virus by the process known as phagocytosis. They engulf these harmful particles and in this way it kills the cells.
hence, the correct answer is option B
The cell membrane separates the intracellular environment from the extracellular environment outside of the cell. A phospholipid is composed of a phosphate group and a lipid. It is composed of a hydrophilic, polar phosphate head and two hydrophobic fatty acid tails.
The structure of the bilayer is such that the tails are shielded from contact with water, creating a selectively-permeable barrier which will be impermeable to most hydrophilic molecules.
So, the answer is A) To maintain balance of water and nutrients in the cell.
