Bees (0)

Sarnased õppematerjalid

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Sunflower

Phoma macdonaldii H. Insects, Pollinators, and Birds: Bees are beneficial to sunflower yield because they carry pollen from plant to plant which results in cross pollination. Some sunflower varieties will not produce highest yields unless pollinators are present. All varieties will produce some sterile seed (without meats), but varieties differ in their degree of dependence on insect pollinators. Autogamous sunflower hybrids do not require bees for maximum yield and will yield the same when covered by bags as uncovered. In non-autogamous sunflower varieties, pericarp (bull) development is normal but no ovules or meat develop. Wind is relatively unimportant in cross-pollination of sunflower. Some of the older open-pollinated varieties such as Peredovick set only 15 to 20% of seed without pollinators, whereas many hybrids set 85 to 100% seeds without pollinators.

Ökoloogia ja keskkonnakaitse1

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Giant Panda - slideshow

T Ü T üri C o lle g e Liina Le inm e ts  Introduction · Panda (Ailuropoda melanoleuca) is a mammal classified in the bear family, native to centralwestern and southwestern China. It is easily recognized by its large, distinctive black patches around the eyes, over the ears, and across its round body. · The Giant Panda lives in a few mountain ranges in central China. · It once lived in lowland areas, but farming, forest clearing, and other development now restrict the Giant Panda to the mountains.  In the wild · The Giant Panda is a · Pandas communicate terrestrial animal and through vocalization primarily spends its life and scent marking such roaming and feeding in as clawing trees or the bamboo forests. spraying urine. It is able · Though generally alone, to climb and take each adult has a shelter in hollow trees defined territory and or

Inglise keel

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Essay on water pollution, global warming, acid rain, deforestation, intensive farming

biological control. This technique demands utmost caution and thorough study, as it could go all wrong, if not managed properly. It is very difficult to pick a side in the debate regarding intensive farming. While it is true that agricultural intensification is necessary to meet the ever-increasing population growth, it is also true that intensive use of chemical fertilizers will largely affect the health of human beings, plants, fish, honey bees, frogs, birds, and livestock. There is a tug-of-war between the animal rights activists and farmers of intensive farming. However, the debate is still ongoing, but we hope to see some new inventions or improvements in the near future. Read more at Buzzle: http://www.buzzle.com/articles/advantages-and-disadvantages-for-intensive- farming.html

Inglise keel

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Eating bugs

Eating bugs Annika Annika History Hunters and gatherers ate bugs to survive Christians and Jews ate bugs "At first the males are better to eat, but after copulation the females, which are then full of white eggs." Main info 1,462 species of edible insects crickets, cicadas, grasshoppers, ants, worms and scorpions, tarantulas. Insects used as a source of nutrients and insects as condiments Pesticide use can make insects unsuitable  We eat from one to two pounds of insects each year Most of insects are caught wild except for silk moth pupae Ants have a lemon tang Giant water bugs taste of mint Fire ant pupae taste of watermelon  Where it`s popular and how they eat them? Africa, Asia, and Latin America Winged termites are collected and fried, roasted, or made into bread. With cornmeal porridge. Beekeepers are considered virile, because they regularly eat larvae from their beehives De-winged dragonflies boiled in coconut milk with ginger and garlic. The agave worm, i

Inglise keel

3

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Rare animals

Rare animals Rare Chinese tiger seen in the wild Researchers have confirmed that a wild tiger, photographed by a farmer in the Qinba Mountains of Shaanxi Province, Central China, is indeed that of the critically endangered South China tiger. The South China tiger ­ classified as one of only five subspecies of tiger still alive today ­ is extremely rare, with only an estimated 20 to 30 still remaining in the wild. The wildlife and conservation group WWF says the South China tiger is actually native to the Hainan most forests of south-east China, and because there are so few individuals left, it is regarded by many scientists as being "functionally extinct" in the wild. But a group called Save China's Tigers has been working on a captive- breeding programme and hopes to reach an agreement with China's State Forestry Administration to reintroduce captive-bred animals into the wild. If all goes well, the first individuals could be reintroduc

Inglise keel

2

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Tundra

Tundra Tundra is the world's youngest biome. It was formed 10 000 years ago. Located at latitudes 55° to 70° North. Almost all tundras are located in the Northern Hemisphere, encircling arctic desert and extending south to the coniferous forests of the taiga. The ecotone (ecological boundary region) between the tundra and the forest is known as the tree line or timberline. Tundra comes from the Finnish word tunturi, meaning treeless plain. It is noted for its frost-moulded landscapes, extremely low temperatures, little precipitation, poor nutrients, and short growing seasons. Dead organic material functions as a nutrient pool. The two major nutrients are nitrogen and phosphorus. Nitrogen is created by biological fixation, and phosphorus is created by precipitation. The most distinctive characteristic of tundra soil is its permafrost, a permanently frozen layer of ground. The average winter temperature is -28°C, but the average summer temperature is 3-16°C. During the brief summ

Inglisekeelne geograafia

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Austraalia kohta inglise keelne referaat

Tallinna Inglise Kolledž Australia Referaat Tallinn Table of contents: Introduction.....................................................................................................................3 Geographical Position.....................................................................................................3 Relief...............................................................................................................................4 Climate & Time Zones....................................................................................................5 Plants...............................................................................................................................5 Animals...........................................................................................................................6 Population......................................................................................

Inglise keel

356

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Cats

AMBER AND RUSSET - LATE COLOUR CHANGE GENES Copyright 2014, Sarah Hartwell The ancestors of the domestic cat were nondescript black/brown striped tabbies. Over the centuries, mutation produced a wide array of colours based on 2 different pigments. Eumelanin gives the blacks, browns and blues while phaeomelanin gives the reds, fawns and creams. A few other genes give further variations on those colours such silvers, colourpoints and solids/selfs. Mutations continue to occur and unexpected colours also turn up due to inbreeding where recessive genes, hidden for generations, start showing up. AMBER AND LIGHT AMBER During the 1990s, some purebred Norwegian Forest Cats in Sweden produced chocolate/lilac and cinnamon/fawn offspring. However, those colours are not found in the purebred Norwegian Forest Cat gene pool. Had the gene pool become polluted by someone, perhaps generations ago, breeding their Norwegian Forest Cat to another breed? Was it a spontaneous mutation? Crossing of those c

Inglise keel

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