Changing only one variable at a time is a rule for conducting a controlled
experiment.
Controlled experiment involves the use of dependent and independent
variables . Changes in the independent variable brings about a
corresponding change in the dependent variable which is then recorded.
It is however important to note that changing more than only one variable at
a time won't accurately determine if the changes in the results were as a
result of one cause. This is why only one variable has to be changed at a
time.
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Answer:
it is c the answer is C ok thanks
Answer:
The correct answer is 4. Anchoring cells in position.
Cell adhesion proteins are the class of proteins found on the surface of the cell and are involved in the process of cell adhesion.
Cell adhesion is the process by which cell binds to the other cell or to the extra cellular matrix with the help of cell adhesion molecules (CAMs) or proteins.
CAMs show three major types of interactions to achieve cell adhesion.
- Homophilic in which CAMs bind with the same CAMs.
- Heterophilic in which CAM of one cell binds to that of of other cell.
- In third type of interaction, CAMs of two cells bind to a mutual extracellular ligand.
Cell adhesion proteins are also called as molecular glue as they help in anchoring the cells in the position.
Answer:
The blood vessel from lungs to heart is pulmonary vein which carries oxygenated blood.
The plasma membrane is composed of a phospholipid bilayer, which is two layers of phospholipids back-to-back. Phospholipids are lipids with a phosphate group attached to them. The phospholipids have one head and two tails. The head is polar and hydrophilic, or water-loving.