That's why dry deserts(沙漠) are almost not covered by trees or grass. Plants must also have a place in which to put down their roots and grow. They find it difficult to grow on hard land. The town is built on hard land. The plants there have only the soil found between the ...
B. Because there is too much water. C. Because it is too crowded there. D. Because it has little food for plants.)15. Which of the following is TRUE according to the passage? A. Plants can grow well without warmth. B. Nothing grows in very cold places. C. All the plants can ...
With growing problems of poor nutrition in the United States there have been two different but related phenomenon that have appeared. First, the obesity epidemic that has ravaged the nation and left an increasing number of people very unhealthy; and second, the phenomenon of food deserts where ...
Why are ecological farming methods important? Why is human biology important? Why are bees important to biodiversity? Why are algae so important to aquatic ecosystems? Why are coastal deserts important? Why are mushrooms important to the food chain?
Deserts are defined as areas with very little precipitation and a lack of biodiversity. This article provides examples of deserts, such as the Mojave Desert, and olffers relevant terms, such as chloroplasts, photsynthesis, and cacti. Learn how biodiversity, as well as the amount ...
B. Scientists ask people to live in the deserts and grow food there. C. People do bad things to the earth.✓ D. Scientists may not be able to change the deserts.✓b34. Why are green plants and grass helpful? A. They can hold the water. B. They can stop the wind from ...
三、阅读理解Why are plants grown in some places but not in others? Why does some land have so many plants growing on it, while other land has almost no plants growing on at all?To grow, plants need some things. One is warmth. In very cold places, almost nothing grows. Plants also ...
So are there any answers? Can starvation ever be ended? Can we head off the approaching food and water wars? The countless books about the food system over the past few years make it clear: solutions are easy to lay out and extraordinarily complicated to enact. ...
Why do most deserts have interior drainage patterns? Why is the Sahel important? Why are sea urchins important to coral reefs? Why is acid rain harmful to marble and limestone structures? Why are trees last in ecological succession? Why are plants green?
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