With the advent of industrialization, several trees have been cut at an alarming rate for raw materials and various other purposes. This felling of trees can be regulated by selective cutting, clear-cutting and shelterwood cutting.
Forest fires are one of the common causes of loss of forests. Sometimes the forest land is set on fire to make the land available for commercial purposes. Once cleared, there can be no vegetation. Natural forest fires are also responsible for the destruction of huge forest covers. Latest fire fighting techniques should be adopted to conserve the forest. However, forest fires are an important part of the ecosystem and it helps replenish nutrients in the soil from dead and decaying matter.
More trees should be planted to increase the forest cover. Trees should be selected according to the geographical conditions of a particular region and proper care should be taken during the growth of trees.
Prevention of exploitation of forestry and forest products is necessary for the conservation of forest.
The existing forests should be protected from diseases by spraying chemicals, antibiotics or development of pest-resistant strains of trees.
Answer:
measurement
Explanation:
Metrology is the scientific study of measurement. .The first being the definition of units of measurement, second the realisation of these units of measurement in practice, and last traceability, which is linking measurements made in practice to the reference standards.
Flatworms only has one opening that they use for digesting and excretion of wastes. They do not have a true body. The opening is contains a part that is used to vacuum in food called flukes which can have a pharynx. Flatworms are flattened invertebrates. That lives as a parasite.
Small marine iguanas that live in the Galápagos Islands can sprint faster than large iguanas. Currently, the only predators of marine iguanas are hawks, which are able to catch iguanas regardless of their size. If new predators (for example, cats) that preferentially catch and eat slower iguanas are introduced to the island, iguana body size is likely to decrease in the absence of other factors; the iguanas would then be under disruptive selection.
The Galapagos iguanas are thought to have shared a common ancestor who floated out to the islands on rafts of vegetation from the South American continent. The split between land and marine iguanas is thought to have occurred 10.5 million years ago.
Galapagos land iguanas are larger and more colorful than their marine cousins, with a dull golden yellow coloration. They eat tender cacti and fruit and are vegetarians. In addition, unlike marine iguanas, it is uncommon to see more than one at a time.
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