In terrestrial ecosystems phosphorus is included into biocycle by: ответ на тест 1056238 - Экология

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Calcium and phosphorus are important minerals in fetal – bone development, a pregnant woman requires 1.200 mg of calcium and phosphorus daily. This is a 50 increase over what a woman needed before she became pregnant.
Dairy products are excellent sources of both calcium and phosphorus, as well as of vitamin D which is necessary for calcium absorption.

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                                            Mangroves
1. Mangroves are the characteristic littoral plant formations of tropical and subtropical sheltered coastlines. Generally speaking, mangroves are trees and shrubs growing below the high-water level of spring tides. Their root systems are thus regularly inundated with saline water, even though it may be diluted due to freshwater surface run-offs and only flooded once or twice a year. Mangroves depend on terrestrial and tidal waters for their nourishment, and on coastal soils and silt deposits from upland erosion as substrate for support.
2. Mangroves are among the most productive terrestrial ecosystems and are a natural, renewable resource. However, the world's mangroves are beleaguered. Mangroves are losing their habitats as rivers are dammed, their waters diverted and the intertidal zone extensively developed for agriculture or aquaculture and generally dried up.
3. The depletion of mangroves is a cause of serious environmental and economic concern to many developing countries. This stems from the fact that at the interface between the sea and the land, mangroves play a pivotal role in moderating monsoonal tidal floods and in coastal protection. The continuing degradation and depletion of this vital resource will reduce not only terrestrial and aquatic production and wildlife habitats, but more importantly, the environmental stability of coastal forests that provide protection to inland agricultural crops and villages will become seriously impaired.
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Which of the following is true:

There are different types of interaction between populations in the biotic community. The type of interaction in the picture is called …

The maximum speed that animals develop in aquatic and terrestrial environment  is determined by such property as …

swfobject.registerObject("taskflash0", "10.0.0"); У Вас не установлен Adobe Flash player Используя имеющееся на экране оборудование, определите содержание (мг/л) загрязняющих компонентов – карбофоса (1) и ацетофоса (2) – в пробе образца, рассчитайте их суммарный загрязняющий эффект, если ПДК1 = 0,1 мг/л, ПДК2 = 0,03 мг/л, и сделайте вывод о допустимости использования анализируемого водного объекта для хозяйственно-питьевого и культурно-бытового водопользования.
В ответе приведите значение суммарного загрязняющего эффекта (с точностью до десятых) и вывод о допустимости (без пробелов и запятых), например 0,8допутимо или 1,2недопустимо.
Порядок выполнения
1. С помощью микрошприца ввести пробу анализируемого образца в прибор для измерения содержания загрязняющих компонентов (хроматограф).
2. Нажать на кнопку «start».
3. На экране измерителя появляются два значения содержания загрязняющих компонентов в (мг/л).