In ecology, a disturbance is a temporary change in environmental conditions that causes a pronounced change in an ecosystem.
Disturbances often act quickly and with great effect, to alter the physical structure or arrangement of biotic and abiotic elements.
Disturbance can also occur over a long period of time and can impact the biodiversity within an ecosystem.
Major ecological disturbances may include fires, flooding, storms, insect outbreaks and trampling.
Earthquakes, various types of volcanic eruptions, tsunami, firestorms, impact events, climate change, and the devastating effects of human impact on the environment (anthropogenic disturbances) such as clearcutting, forest clearing and the introduction of invasive species can be considered major disturbances.
Not only invasive species can have a profound effect on an ecosystem, but also naturally occurring species can cause disturbance by their behavior.
Disturbance forces can have profound immediate effects on ecosystems and can, accordingly, greatly alter the natural community. Because of these and the impacts on populations, disturbance determines the future shifts in dominance, various species successively becoming dominant as their life history characteristics, and associated life-forms, are exhibited over time.
A. bind and unwind double helix
Through the urethra which is in a mans' penis or a woman's vagina.
Answer:
for a hypothesis to be part of an accepted theory, it must have been extensively tested through experiments under different conditions
Answer:
C) 50%
Explanation:
Let the homozygous recessive organism be rr
Let the heterozygote be Rr
If both organism crosses together: Rr × rr
= we have ( Rr, Rr, rr, rr) as their offspring.
The question says; what is the chance of producing an offspring with the homozygous recessive phenotype?
From above, the chance of producing an homozygous recessive is 50%.
i.e (2/4) × 100%
=(1/2) × 100%
= 50%
