The answer is; concentration of oxygen and/or total atmospheric pressure is lower at high altitudes
This means that at high altitude, due to the low pressure, every breath has a lower oxygen content than at a lower altitude. This, therefore, necessitates the body to increase the erythrocyte numbers in the blood to maximize the uptake of oxygen from the thinner air.
Answer: a. The amount of artificial daylight the colonies are exposed to
d. The amount of food available for foraging
Explanation:
The independent variable is the variable that can be changed and manipulated in an experiment. This is likely to bring variations in the experimental variable of the experiment.
In the given situation, the two variables artificial daylight and available food can be controlled to eliminate the variations in the experimental outcome. For example, the intensity of the light may affect the colonization of ants and the amount of food also may either increase or decrease the population of ants.
It's because taking them regularly until the prescription is complete helps ensure that all of the illness-causing bacteria are killed or prevented from multiplying
When a lineage splits into multiple line of descents, then, it leads to speciation. It is a process by which a single population evolves into different species. The process of speciation leads to the development of two or more species as the lineages are splitted. These two evolved species are genetically independent.
Hence, the blank can be filled with 'speciation'.
Answer:
They must shed their exoskeleton, or molt, in order to grow. The exoskeleton splits open. the animal emerges and swells to a larger size until the newer, larger exoskeleton is hardened.