Octopus and squid have chemoreceptors on their tentacles. The correct option is the third option.
E-cool is a bacterium that occurs naturally in the intestines of people and animals
Answer:
Option (B).
Explanation:
Heart is the main pumping organ of the body. The human heart is divided into four chambers that are right atria, right ventricles, left atria and left ventricles.
The left and right ventricles can easily be distinguished on the basis of their thickness. The right ventricle is less thicker than left ventricle. The thickness of right ventricle is 9mm whereas the thickness of left ventricle is around 40mm.
Thus, the correct answer is option (B).
No a cell is made of molecules which is made of atoms
