Bacteria that change nitrogen gas from the atmosphere into solid nitrogen usable by plants are called nitrogen-fixing bacteria. These bacteria are found both in the soil and in symbiotic relationships with plants.
organisms are always in competition for resources such as food and water or simply just for space.
Euglena are single cell flagellates....they have chloroplasts so are capable of photosynthesis- like a plant...but can also “eat” other carbon sources. They belong to the Kingdom Protista.
<span>The concentration of many people into the small area, for example, A city lowers the overall footprint of the population in the region.
Any pollution which results from people in a city can be isolated and treated more easily even than when people are being dispersed widely.
Many cities outlined suburbs to have a lower concentration of people because it can complicate public transport and provision of services. </span>
Sociologists argue that the division of the human population into two distinctive and mutually exclusive categories, male and female, is best understood as a biological fact.
The division into these two major categories as male or female is mainly due to the biological and the physiological characteristics produced in both male and female.
Although in some cases, it may be argued that they are not mutually exclusive as there are some who have both.
Nevertheless, the above mentioned characteristics are just used to differentiate between a male and a female in humans and as well an individual self-concept of being a male or a female.
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