While a constant supply of freshwater happens by itself in natural streams, an aquarium is by definition, a closed system. So here, man has to help out in order to provide new..
Answer:
False
Explanation:
Ethyl alcohol is formed only during alcoholic fermentation and in lactic acid fermentation lactic acid is formed
Independent Variable: Scenarios (such as different times of the day or places) used to check if a person will become depressed or not.
Dependent Variable: Number of people diagnosed with depression.
Constant: Amount of people who do not understand depression.
Control: How your setting can impact mood and performance.
The integumentary system (skin) has been called a membrane and an organ but, it is generally considered a system because it has organs that work together as a system. It is sometimes considered an organ because it contains several types of tissues and a membrane and it covers the body.
Answer:
B
Mutation is the ultimate source of genetic variation, but mechanisms such as sexual reproduction and genetic drift contribute to it as well Because prokaryotes are haploid, such a mutation immediately become part of the genetic makeup of the cell unlike eukaryotic diploids where a normal second copy of the gene usually protects the cell from the potentially lethal effect of such a mutation.
