Plants' roots also hold soil (土壤) together and stop it from being washed away into the sea.练有所得 学习能力构建1. What do we learn about the first plants? A. They grew on land. B. They grew in water. C. They evolved 400 million years ago. D. They appeared 135 million years ...
Many botanists conclude that the best explanation for the large numbers of primitive living angiosperms in the South Pacific region is that this is where the flowering plants first evolved and these modern species are relics of this early evolution. Comparisons of the DNA of Amborella and many ...
When plants evolved to flower earlier in the season, what is the likely effect on the ecosystem? A. It disrupts the hibernation cycle of some animals. B. It causes a decrease in the number of bees that can pollinate them. C. It may change the timing of when fruits are available, ...
But do you know our species has evolved to run better than any other animals on this planet? Cheetahs are the fastest land animals in the world. But do you know that humans can leave them in the dust? At least, in the long run, that’s right. When it comes to endurance, we can ...
Ancient fresh water green algae must have evolved features that enable them to withstand extremes of temperature and periods of dryness. These adaptations served their descendant well as they invaded land.The terrestrial world is green now, but it did not start out that way. When plants first ma...
As some plants evolved the ability to fix nitrogen from the air, what would be the likely change in the ecosystem? A. The amount of carbon dioxide in the atmosphere would increase. B. Other plants that depend on nitrogen - rich soil would thrive. C. The number of decomposers would ...
[#insert2] For example, some have blamed dinosaur extinction on the development of flowering plants, which were supposedly more difficult to digest and could have caused constipation or indigestion—except that flowering plants first evolved in the Early Cretaceous, about 60 million years before the...
As plants evolved to have spiky leaves for defense, which of the following is the impact on the ecosystem? A. Herbivores would immediately go extinct. B. It would change the foraging behavior of herbivores. C. It would make the soil more fertile. D. It has no impact on the other ...
In addition, other lines of evidence support the hypothesis that land plants evolved from ancestral green algae used the same type of chlorophyll and accessory pigments in photosynthesis as do land plants. This would not be true of red and brown algae. Green algae store food as starch, as do...
haveevolvedfeaturesthatenablethemtowithstandextremesoftemperatureandperiodsofdryness.Theseadaptationsservedtheirdescendantwellastheyinvadedland.Theterrestrialworldisgreennow,butitdidnotstartoutthatway.Whenplantsfirstmadethetransitionashoremorethan400millionyearsago,thelandwasbarrenanddesolate,inhospitabletolife.Fromaplant...