Answer:
23
Explanation:
Human somatic cells have 46 chromosomes, including 22 homologous pairs and one pair of nonhomologous sex chromosomes. This is the 2n, or diploid, condition. Human gametes have 23 chromosomes, one each of 23 unique chromosomes. This is the n, or haploid, condition.
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Answer:
The nervous system is made up of the brain, spinal cord and nerves. It is the body's communication system that controls much of what your body does. It allows you to do things like walk, speak, swallow, breathe and learn, and controls how your body reacts in an emergency.
Explanation:
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:
C. could not provide a mechanism for moving continents
Explanation:
Magnetic reversals have the habit of causing geological displacements, since they are directly linked to the movements and distribution of tectonic plates on the planet, which are responsible for the movements of the continents. In this case,
if the discovery of magnetic reversals recorded on the ocean floor were not carried out, it would be impossible to establish its relationship with the movement of the tectonic plates, making it impossible to provide a mechanism for moving continents.
The once white light beam would turn green. the people (humans) would only see green.