Answer:
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Factors affecting forest growth and possible effects of ...
by Y Yang · 2006 · Cited by 56 — The results are in agreement with the results of PCA. The major factors influencing forest growth are ...
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https://academic.oup.com › cpi062
Factors affecting forest growth and possible effects of ...
by Y Yang · 2006 · Cited by 56 — Even with the huge efforts at both gov- ernmental and local levels, forest cover in 1990 was only 15.3 per ...
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What factors affect the growth of forest?
4 Factors affecting forest resources
4.1 General. Bhutan's economy is a basic need-based economy with predominance of the agriculture, livestock and forestry sectors. ...
4.2 Human population. ...
4.3 Agriculture. ...
4.4 Livestock. ...
4.5 Human development. ...
4.6 Economic development. ...
4.7 Inter and intra-sectoral growth. ...
4.8 Economic linkages with other sectors.
Ichnology is the study of the trace fossils. Trace fossils are evidences that are left by the organisms and examples would include burrows, coprolites, imprints and footprints.Hope these are the answers and would then be of help in this assignment.
Answer:
They found evidence of an impact crater in Mexico
Explanation:
The K-Pg boundary is the boundary that separates two periods, but also two eras. The two periods that are separated by this boundary are the Cretaceous and the Tertiary, while the two eras are the Mesozoic and the Cenozoic. The boundary is marked by a mass extinction, and the scientists started to hypothesize as to why it happened. There were numerous different theories, but a clue in Mexico, or rather right next to the Yucatan Peninsula, shed new light on it. The scientists found an impact crater, formed either by a large asteroid or a comet. Such an impact would have easily caused sudden and drastic changes on the Earth, killing of the majority of the species. This impact released such a big amount of energy that it killed everything in the surrounding area in seconds. On top of that, it caused an extremely hot wave of air across the whole planet, killing many more organisms. It managed to trigger most of the volcanoes to erupt, as well as the earthquakes, causing also very large tsunamis. The sunlight got blocked for quite some time from all the aerosols in the atmosphere as well. This resulted in a mass extinction of the dominant species, like the dinosaurs, but it opened up the terrain for the evolution of the others, like the mammals.
Question 2:
<span><u>slow, steady evolution of a small isolated population</u></span><span>
This evolutionary theory suggests that a species slowly and continuously evolved over a long period of time. This selection and variation happens more gradually. It is hard to notice over a short period of time. The change is slow, constant and consistent. In punctuated equilibrium, the changes come in spurts. There are periods wherein a huge change occurs and there are also periods with very little change. The mutation is at random. Genetic drift is the change in the frequency of a gene variant due to a random sampling of organisms. </span>
