Size- Example 1:A population with a greater number of individuals has more chances of survival over time and when unprecedented times arrive at their doors because the genetic variability in the bigger population will certainly be more than that in the smaller populations. Density- Example 2:A p...
an ecosystem science definition entails an ecological community consisting of different populations of organisms that live together in a particular habitat. Natural sciences like
Biologists distinguish between two main types of populations: unstructured and structured. In an unstructured population, all individuals are subject to the same general ecological pressures. That is, the rates of growth, reproduction, and mortality are roughly the same for all individuals in the popu...
conditions for benthic life, the interannual fluctuations of benthic populations, the transfer of energy between plankton and benthos, settlement conditions at the benthic stage, variations in reproductive patterns with latitude, biogeographic implications of larval dispersion, larvae and evolutionary processes...
This type of selection, called directional selection, decreases the amount of genetic variation in populations. Alternatively, an individual carrying two different alleles for the same gene (a heterozygote) may have advantages, as exemplified by the well-known example of the sickle-cell allele in ...
Explore what altruism is in biology. Discover the many examples of altruistic behavior in animals and understand how altruism differs from natural...
These population pyramids tend to reflect populations where birth rates are relatively low, but the overall quality of life is high. The previous 2017 United States population pyramid in Figure 1 is an example of a stationary pyramid. This is a population pyramid depicting Finland in 2012. ...
Variation, in biology, any difference between cells, individual organisms, or groups of organisms of any species caused either by genetic differences (genotypic variation) or by the effect of environmental factors on the expression of the genetic potenti
Predators keep prey populations in check, which allows the number of predators to increase. This increase results in a decrease in prey populations as the predators consume the prey. This loss of prey then leads to a decrease in predator numbers, which allows prey to increase. This continues ...
Application of molecular genetic markers appeared to be very fruitful in achieving many goals, including (i) proving the theoretic basements of general biology and (ii) assessment of worldwide biodiversity. Both are provided in the present meta-analysis