Population Changes
Change is inevitable in nature.
Ecosystems have to cope with sudden changes like hurricanes and long term changes like ice ages.
Healthy Ecosystems will withstand the stress caused by change. Populations will recover or adapt to a new climate.
Population Changes
Stressed ecosystems do not handle change well.
They are already fragile or out of balance. They react with population spikes (boom) and population crashes (bust)
Population spike (boom)- Increase in population happens quickly.
Population crash (bust)- Decrease in population happens quickly
Sometimes a stressed ecosystem will not recover from change.
Population Effects Ecosystems
If a change affects one population in an ecosystem, the change will be felt throughout the system over time.
When one population of organisms increases or decreases, other populations will be affected because all living things are interrelated.
Answer:Strontium-90 and cesium-137 have half-lives of about 30 years (half the radioactivity will decay in 30 years). Plutonium-239 has a half-life of 24,000 years. High-level wastes are hazardous because they produce fatal radiation doses during short periods of direct exposure.
Explanation:
42700 milliliters would be the answer...
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The answer is: D.unstable nuclei emitting high-energy particles as they formed more stable compositions.
Those high-energy particles are alpha particles
, beta particles
, gamma radiation.
For example, the decay chain of ²³⁸U is called the uranium series.
Decay start with U-238 and ends with Pb-206. There are several alpha and beta minus decays.
Antoine Henri Becquerel (1852 – 1908) was a French physicist and the first person to discover evidence of radioactivity.
Becquerel wrapped fluorescing crystal (uranium salt potassium uranyl sulfate) in a cloth, along with the photographic plate and a copper Maltese cross.
Several days later, he discovered that a image of the cross appeared on the plate.
The uranium salt was emitting radiation.
Because of this discovery, Becquerel won a Nobel Prize for Physics in 1903, which he shared with Marie Curie and Pierre Curie.
Answer:see attached photo for answer
Explanation:cell division occurs to produce new cells from preexisting ones. the new cells are called daughter cells.the old cells are called parent cells.cell division may be mitosis or meiosis. Mitosis occurs in a somatic cell and produce four daughter cell. Meiosis occurs in sex cells and produce two daughter cells. Cell division usually involves Prophase, metaphase, anaphase and telophase.
Cell division occurs to ensure the continous existence of life.
Mitosis involve producing daughter cells with the same number of chromosomes as the parent cells while meiosis involves producing daughter cells with Half number of chromosomes.
