<u>Answer:</u>
<em>A constant is something whose value cannot be changed and is used for comparison purpose. </em>
<u>Explanation:</u>
The controlled variable is a type of variable whose value is kept constant during the experiment to get the desired or expected result. The difference between constant and a control variable is that the constant can never be changed.
However, the value of control variable can be changed but is kept constant with a purpose in an experiment to get the data. The controlled variable in a battery can be the multi meter that should be used for all the batteries.
Answer:
The plasma membrane, or the cell membrane, provides protection for a cell. It also provides a fixed environment inside the cell, and that membrane has several different functions. One is to transport nutrients into the cell and also to transport toxic substances out of the cell.
Explanation:
Answer: by eating meat from animals...?
Explanation: Well lions do actually eat meat so whenever they eat meat I'm guessing they get whatever they need. I'm still learning so sorry if I am wrong.
Answer:
HEREDITY ONLY:
none
GENETIC VARIATION ONLY:
none
BOTH:
all
Explanation:
In all the organism that reproduce sexually, produced offspring are genetically varied. As this genetic variation continues, it also leads to hereditary evolution of organism through gene flow from one generation to other. Therefore, the processes of DNA replication, crossing over, chromosome separation and alignment etc. ensure flow of genes from one generation to the next. This does not happen in organisms reproducing asexually.
Catheter was used to remove excess fluid from pleural space. it is necessary to drain air, secretions and blood from thoracic space in order to allow normal expansion of lungs. when surgeon places a catheter in the chest, they provide a drainage route that removes excess air and other body fluids that may build up. in some occasions two catheters are installed after surgery, one posteriorly and the other anteriorly.
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