5Most recent vaccines(疫苗) have taken years to develop. But new technological methods and a more efficient development process could greatly shorten the time it takes to produce a vaccine against a new disease that may cause an epidemic(流行病). Vaccine-makers are faced with an urgent test ...
Sexual size dimorphism has motivated a large body of research on mammalian mating strategies and sexual selection. Despite some contrary evidence, the narrative that larger males are the norm in mammals—upheld since Darwin’s Descent of Man—still domin
根据文章第一段“When scientists talk about recent extinctions, birds and mammals(哺乳动物)get most of the attention. But the first global analysis of its kind finds it is twice as many plants that have disappeared as birds, mammals, and amphibians (两栖动物) combined.(当科学家谈论最近的物种...
38. A recent news report talked about scientific efforts to help crops survive droughts through genetic engineering. 39. It is predicted that climate change will affect the availability and price of qualify chocolate. 40. People wonder if certain crops and foodstuffs could disappear like some animal...
Both the US and Canada have implemented new laws in recent years to try to lower the number of human-caused deaths. 美国和加拿大已经在近几年实施新法试图减少人为死亡数量。 Some have helped, but clearly, there's a lot more work to do. 一些有帮助,但显然还不够。 Because ultimately, if we...
B. Their ivories have become popular in recent years. C. 50% of the population has been killed for their skin. D. They are losing their habitats. 3. Which of the following is a good way to help protect the snow leopard? A. Providing more food for them. B. Helping them live in di...
Scientists have named the new eel Electrophorus voltai. The team of researchers actually found two new species of electric eel, but Electrophorus voltai is grabbing the headlines because of its electrical power. Up until the...
Stuart Butchart of BirdLife International. “Many people still think of climate change as a problem that's going to arise in the future," he says. “This is another study showing that entire communities of species have already shown considerable responses to climate change over recent decades. ...
Densities of nine endemic bird species were higher in sanctuaries compared to unprotected sites (0.27-9.00 more birds/ha), but we found no significant difference in mean population densities for introduced and biogeographically recent native spe- cies. These findings provide compelling evidence that ...
The waters off Motueka’s coast are far balmier than other South Island locales thanks to its position at the tippy top of the isle. Good thing, too, as its saltwater baths are worth a dip, particularly following a recent refurbishment. ...