How do spermatogenesis and oogenesis differ in terms of the number of gametes they produce?
Answer:
Early organisms in the precambrian era converted ___Carbon dioxide__ to oxygen.
Explanation:
THE PRECAMBRIAN ERA:
The word Precambrian means before the Cambrian period. Before the formation of oldest rock with having fossils in them this term was used to the whole period of earth's history.
This era gone through number of important changes. One important change is that atmosphere of this era is deprived of Oxygen. All other content of the atmosphere is same as component of air present today but with little water vapours. Early organisms in the precambrian era converts carbon dioxide into oxygen. This oxygen was very less and begins to combine chemically with iron and other elements. This produces great mineral deposits around the world. This is the era from where aerobic respiration organisms start their life cycles.
Ecologist make models to be able to examine complicated environmental processes more readily and quickly.
Ecologists can also attempt to forecast what will happen in the future. Ecologists use the model to analyze natural events in order to better understand them.
An ecosystem model is an abstract, typically mathematical, representation of an ecological system (varying in scale from an individual population to an ecological community or even a whole biome) that is examined in order to get a better understanding of the real system.
There are two types of Ecologist Models;
(1) analytic models
(2) simulation / computational models.
Thus, to obtain understanding into complicated phenomena such as the consequences of global warming on ecosystems the ecologist make models.
Learn more about Ecologist Models here,
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Answer:
In a process called radiometric dating, scientists measure the fix decay rate of an isotope to determine the age of the earth.
Explanation:
In the process of radiometric dating we can find the age of fossils, how long the rocks formed and fossils contains within those rocks. Radiometric is very accurate to date the earth, and radioactive decay of unstable isotopes like uranium, carbon and potassium that are slow to decay.
Scientist measures the fixed decay rate during the radioactive decay, it happens when an unstable atomic nucleus continuous changes to lower energy state and splits the radiation.