Majorly population growth is affected by birth and death rates and also on the migration, immigration factors it also depends on the favourable condition.
like if environment is favorable enough food, living space, no competition, no lethal diseases and also temp. water availability) than growth will be good, if not than growth will be less.
These density-independent factors include food or nutrient limitation, pollutants in the environment, and climate extremes, including seasonal cycles such as monsoons. In addition, catastrophic factors can also impact population growth, such as fires and hurricanes.
Fertility Rate
The factor which affects the growth of the population in the biggest way is the fertility rate. The fertility rate is typically measured by the number of children per one woman of child-bearing age. If the fertility rate is larger than 2, the rule of thumb is that the population should rise, as there are more children than their parents. On the other hand, if this ratio is below 2, the population of the region may be destined for a decline.
Mortality Rate
A key factor affecting the growth of the population is the death, or mortality, rate. Just as the birth of new people increases the population size, deaths decrease it. The factors that affect the mortality rate include the availability and affordability of quality health care and lifestyle habits – for example, whether they smoke or do physical exercises regularly.
Immigration and Emigration
Cross-border migration is the act of people moving from one country to another. It affects the population size of both the host and destination countries. Emigration is caused by a number of factors, such as fleeing war, finding education, seeking new jobs or joining family members. When a person emigrates from a country, its population shrinks. When someone moves to a country from another place, it is known as immigration. Whether or not a person is allowed to immigrate is controlled by the country that will host this person.
3. Nitrogenous bases are held together by what type of bond?
Answers:
1. 2 strands. (known as polynucleotide)
2. DNA is double stranded while RNA is single stranded.
3. Hydrogen bonds.
There are four types of them;
• Adenine and Thymine are double H-Bonds.
• Guanine and Cytosine are triple H-Bonds.
Additional:
Other DifferencesbetweenDNA andRNA:
•DNA contains the sugar deoxyribose, while RNA contains the sugar ribose.
• DNA is stable under alkaline conditions while RNA is unstable.
•DNA is responsible for storing and transferring genetic information while RNA directly codes for amino acids and acts as a messenger between DNA and ribosomes to make proteins.
Ihopeit's helpful:)
3. Nutrients are produced by phytoplankton living in these zones.
4.Nutrients are produced by zooplankton living in these zones
The answer is; 1
Most of the photosynthetic organisms are located in the epipelagic zone of the oceans where sunlight can penetrate before diffusing and becoming too weak to support photosynthesis. The epipelagic zone is filled with plankton. When this plantkon die, they begin to sink slowly to the bottom of the ocean. These plankton are food for small fish. These small fish are food for bigger fishes. This is how an ecosystem is sustained in the deep dark oceans.