Answer:
There are two types of photoreceptors in the human retina, rods and cones. Rods are responsible for vision at low light levels (scotopic vision). ... Cones are active at higher light levels (photopic vision), are capable of color vision and are responsible for high spatial acuity.
In this question, you are asked to make 5% Calcium chloride(CaCl2) solution. For every 1000ml of water, the weight should be 1000grams. Then for 5% solution, the CaCl2 needed would be:
5% * 500 ml * 1gram/ml= 25grams
Calcium chloride is made from 1 calcium and 2 chlorine, so the molecular mass would be (1*40) + (2*35.5)= 111 gram/moles. Then, 25 grams of CaCl2 would be: 25gram / (111 gram/moles)= 25/111 moles.
Molarity unit is mole per 1000ml of solvent. So the molarity of the solution would be: (25/111 moles) / (500ml/1000ml)= 50/111M= 0.45M
The difference between them is that an ecosystem is a community of organisms and their environment. And a biosphere is all the living organisms.
The tissue to have cells with the greatest number of gap junctions is the cardiac tissue.
Cardiac tissue refers to the involuntary, striated tissue present in the heart. It is made up of individual heart muscle cells called the cardiomyocytes. They are joined together by intercalated discs which contain the gap junctions. Gap junctions are the specialized intercellular connections which link the cytoplasm of two cells. Gap junctions play a crucial role in regulating the velocity and safe impulse propagation in the heart. They are abundantly found in the cardiac tissue helping in direct transmission of the deplolarizing current from cell to cell across the chambers of the heart. The signals for contraction of the cardiac muscle is passed through these gap junctions.