Base pair,chromosome,DNA strand,and nucleus
If a population is consider Hardy Weingberg Equilibrium this means that a population will just stay constant from generation to generation, however keep in min there will be things that play a factor in this as well.
I hope this helps answer your question.
Answer:
The studies of monozygotic or identical twins are used to analyze the degree of genetic influence versus the environmental contribution on a specific pathology, this is because monozygotic twins share 100% of their genes, meanwhile the dizygotic twins share only the 50% of their genes, approximately.
The studies conducted on twins are a special type of epidemiological study because this relation allows the researchers to evaluate and compare the influence of genetic and environmental variables.
Explanation:
Researchers have conducted twin’s studies to discuss the “nature and nurture” question, it is well known that genetics are associated with the environmental factors to produce the human individualities.
However, the twin studies are a perfect model to evaluate the shared genetic and environmental factors for the trait of interest; in addition, it can help to estimate the proportion of variance in a particular genetic variation versus the amount of influence of shared or unshared environment. It also can reduce the amount of genetic and/or environmental variability in a genetic study.
Sahu, M., & Prasuna, J. G. (2016). Twin studies: A unique epidemiological tool. Indian journal of community medicine: official publication of Indian Association of Preventive & Social Medicine, 41(3), 177.
1. Flood plain - occasional or periodic flooding is needed to refresh certain nutrients and promote the life cycles of certain species of plants, animals, and soil organisms.
The ecosystem can be disrupted by "flood control" measures, such as dam building, or by flood-altering measures such as deforestation or pavement.
2. Prairie - the rich diversity of life it supports depends on the burrowing, foraging, and grazing animals who live there, as well as the interaction between plant species of different height, depth, and need for water.
The ecosystem can be disrupted by killing off large grazing animals or by fences that prevent their movement. "Sod-busting" for farming or construction also destroys this ecosystem.
3. Forest floor - this ecosystem provides for nutrient support, pest control, and communication between the plants and animals who live there. The largest known organism on Earth (a fungus) lives under forest soil.
The forest ecosystem is badly disrupted by logging, fire control, and other "management" techniques, as well as by paving, construction, and overuse by people. Reforestation projects may put more trees in the ground, but they don't restore the ecosystem. ("The Hidden Life of Trees" is a good book on this subject.)