Dendrobium is a species of: ?->(Show Answer!)

1. Dendrobium is a species of:

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MCQ->Dendrobium is a species of:....

MCQ->Out of 900 reported species of living gymnosperms, conifers are represented by about 500 species, About 2,50,000 species of angiosperms (flowering plants) have also been reported in the world. The vast and dominant woodlands in Europe, Asia, North America and mountains such as Himalayas are wooded with?....

MCQ-> Read the given passage carefully and select the best answer to each question out of the four given alternatives.The bird life of the Tarai region is much the same as that found in the Malabar Coast and Assam, and includes horn‐bills, barbets, fruit‐pigeons, bulbuls and woodpeckers. Along the cultivated areas and on the edge of the forests are found some of the more common birds of the Indian plains, and many wading birds and water fowls spend the winter among its streams and marshes. The cold season stimulates the migration of many species of birds from Tibet such as wild ducks and cranes, which breed in the mountains and descend to the plains for a brief change. The Central Region is described as a clusterous space of mountains varying in elevation from 4,000 to 10,000 feet with a range of temperature varying from ten to twelve degrees lower the Tarai. It includes the Mahabharat range of mountains which rise to 8,000 feet to form a continuous barrier across Nepal from east to west. At intervals, this mountain wall is pierced by the gorges of the transverse rivers of the Seven Kosis, or the Seven Gandaks, or the noble river Karnali. Between the Mahabharat range and the main Himalayan chain, there are many populous valleys like Dumja, Kathmandu, Pokhara, and many others where the majority of the population is densely concentrated. The fauna of this central zone is characteristically Himalayan. Many of the species occurring in this region are peculiar to Nepal alone. Such animals as the ferret, badger, raccoon, crestless porcupine, etc., do not occur in the Indian peninsula. The whole genera of such birds as yuhina, siva, minla, ixulu, etc., are nearly, if not wholly, restricted to this region. The majority of reptiles occurring in this zone are purely Himalayan species.What does the cold season stimulates?
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MCQ->Five sentences related to a topic are given below. Four of them can be put together to form a meaningful and coherent short paragraph. Identify the odd one out.1. Much has been recently discovered about the development of songs in birds.2. Some species are restricted to a single song learned by all individuals, others have a range of songs.3. The most important auditory stimuli for the birds are the sounds of other birds.4. For all bird species there is a prescribed path to development of the final song,5. A bird begins with the subsong, passes through plastic song, until it achieves the species song.....

MCQ-> The passage below is accompanied by a set of six questions. Choose the best answer to each question. During the frigid season... it's often necessary to nestle under a blanket to try to stay warm. The temperature difference between the blanket and the air outside is so palpable that we often have trouble leaving our warm refuge. Many plants and animals similarly hunker down, relying on snow cover for safety from winter's harsh conditions. The small area between the snowpack and the ground, called the subnivium... might be the most important ecosystem that you have never heard of.The subnivium is so well-insulated and stable that its temperature holds steady at around 32 degree Fahrenheit (0 degree Celsius). Although that might still sound cold, a constant temperature of 32 degree Fahrenheit can often be 30 to 40 degrees warmer than the air temperature during the peak of winter. Because of this large temperature difference, a wide variety of species...depend on the subnivium for winter protection.For many organisms living in temperate and Arctic regions, the difference between being under the snow or outside it is a matter of life and death. Consequently, disruptions to the subnivium brought about by climate change will affect everything from population dynamics to nutrient cycling through the ecosystem.The formation and stability of the subnivium requires more than a few flurries. Winter ecologists have suggested that eight inches of snow is necessary to develop a stable layer of insulation. Depth is not the only factor, however. More accurately, the stability of the subnivium depends on the interaction between snow depth and snow density. Imagine being under a stack of blankets that are all flattened and pressed together. When compressed, the blankets essentially form one compacted layer. In contrast, when they are lightly placed on top of one another, their insulative capacity increases because the air pockets between them trap heat. Greater depths of low-density snow are therefore better at insulating the ground.Both depth and density of snow are sensitive to temperature. Scientists are now beginning to explore how climate change will affect the subnivium, as well as the species that depend on it. At first glance, warmer winters seem beneficial for species that have difficulty surviving subzero temperatures; however, as with most ecological phenomena, the consequences are not so straightforward. Research has shown that the snow season (the period when snow is more likely than rain) has become shorter since l970. When rain falls on snow, it increases the density of the snow and reduces its insulative capacity. Therefore, even though winters are expected to become warmer overall from future climate change, the subnivium will tend to become colder and more variable with less protection from the above-ground temperatures.The effects of a colder subnivium are complex... For example, shrubs such as crowberry and alpine azalea that grow along the forest floor tend to block the wind and so retain higher depths of snow around them. This captured snow helps to keep soils insulated and in turn increases plant decomposition and nutrient release. In field experiments, researchers removed a portion. of the snow cover to investigate the importance of the subnivium's insulation. They found that soil frost in the snow-free area resulted in damage to plant roots and sometimes even the death of the plant.The purpose of this passage is to
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