Answer:
The correct answer would be C. Algae that are placed in a yellow solution and kept in the dark.
In a scientific experiment, a control is a variable which is kept constant or unchanged throughout the experiment.
The results of other variables are compared with the control.
It increases the reliability of an experiment.
In the above experiment, algae must be kept in dark in order to prevent photosynthesis and thus, it prevents the utilization of carbon dioxide.
Similarly, the yellow color solution would also act as control as it would help in observing if any carbon dioxide is utilized from the solution. The utilization or removal of the same would convert the solution blue in color.
Answer:
Carbon, Hydrogen, Oxygen, Nitrogen
Explanation:
The correct answer is A. A law
Explanation:
In science, a law describes a phenomenon or event that always occurs under specific circumstances, and therefore it is constant. Due to this, laws are created based on multiple experiments or observations that lead to the same result. Also, a law only describes a phenomenon but does not explain why this occurs, which belongs to scientific theories.
The statement "traits are passed from parents to offspring independently of one another" by Mendel is a law because it describes a proven and constant phenomenon in genetics. Also, this is the result of the multiple experiments made by Mendel that showed the same result in terms of genetics.
Asexual fertilization is not needed where in sexual it is needed
Answer: Mineral A is made from different elements than Mineral B.
Explanation:
A mineral is an inorganic substance obtain from below the earth crust in the geospheres. They are obtain from the rocks by mining process. These minerals can be identified by their physical and chemical properties. The physical properties include color of the mineral. The color of the mineral can be observed externally but two or more minerals may have the same color externally. But by using the streak method the mineral is rubbed over a surface. The color of the powder obtained after this process is the exact color of the mineral which can be used to distinguish between two minerals. It defines the elemental composition of the mineral.