C.The value of birch trees to some Native American groups D.The trading of birch wood products by Europeans in North America相关知识点: 试题来源: 解析 C 教授第一句话是这样的:today we're going to focus on the Iroquois and Hooray peoples. They lived in the northeastern great lakes region ...
The trees belonging to certain functional groups did not differ in their NREs in different months of a year due to the availability of alternate strategies to acquire nitrogen or being semi-/ evergreen in nature to cope up with their nutrient loss....
Here we investigate whether seedling response to changes in resource availability, and to competition with grass, varied between two functional groups of African savanna trees: species with small leaves, spines and N-fixing associations (fine-leaved species), and species with broad leaves, no spines...
aPeople from different parts of the world, attracted by the climate and the lifestyle, still immigrate to California. It is believed that before long the mix of nationalities will be so great that there will be no distinct major racial or cultural groups, but simply a mixture of many races...
We classified 17 common tree species into three groups; group A was distributed mainly on the upper slope, group B on the lower slope, and group C on both. Most of group A and B trees at stages 2-4 showed an aggregated distribution along the topographical gradient. The densities at ...
Sequence scaffolds were mapped according to the integrated SNP markers on the maternal genetic map of S. suchowensis. The orange bars on the left of each chromosome represented the linkage groups, and the discrete blue bars on the right represented the anchored sequence scaffolds. The mapped ...
call Shenzhen “Peng City” .But there are a lot of people dropping the litter on the ground everywhere,Putting up the ads everywhere,too.As a teenager,we should keep our envionment clean .We can help clean up the streets and plant the trees.When you see the lit 深圳成为一个国际城市。
Deadwood is known to be an irreplaceable substrate for various groups of organisms but its importance for vascular plants is still unclear. To examine which deadwood characteristics promote its colonization by vascular plants and whether species can prefer this substrate to mineral soil (or vice versa...
Why sexually mature individuals stay in groups as nonreproductive subordinates is central to the evolution of sociality and cooperative breeding. To understand such delayed dispersal, its costs and benefits need to be compared with those of permanently leaving to float through the population. However,...
similar initial speciation rates for both groups. Nevertheless, both models clearly justify the higher number ofArion(and/or the lower number ofGeomalacusspecies). The higher diversity originated in the early history ofArionandGeomalacusis most likely an important reason for the observed slowdown ...