aRather, Darwin proposed a concrete mechanism – the process of natural selection -- to explain why lineages change through time and why they diverge from each other as each responds to different environmental circumstances. 相反, Darwin提出了一个具体机制-自然选择的过程 -- 解释为什么后裔通过时间改...
To put it simply, the data suggested that a single winter of overeating as a youngster could initiate a biological chain of events that would lead ones grandchildren to die decades earlier than their peers did. How could this be possible? 表观基因体登场 答案其实和先天、后天都有关。白葛恩...
She left the room halfway through his enumeration of his love for her. After he got over his surprise at being, you know, turned down, he concluded he'd had a narrow escape from marrying an irrational person, although he did make a note to himself that the next time he proposed, it ...
Why do scientists want to clone animals? Cloning: Cloning is the process of making a genetically identical copy of an organism. Although scientists can artificially perform cloning in a lab, cloning is actually a natural reproductive strategy for many animals such as worms, sea stars and others....
Well, some experts say that the chewing action can lead to an increase in blood flow to the brain. Rob Interesting! And guess what, we're taking about chewing gum on today's programme! So here's a question for you, Finn. When ...
This is not pessimism, as it should have been. But to the contrary, other parts of the world are also common, but people still say "the intelligent part of the universe, you are worse than pigs or dogs. You don't like it, it is enough to make people proud of things. The survival...
Why did the chicken cross the road? Darwin: "Chickens, over great periods of time, have been naturally selected in such a way that they are now genetically disposed to cross roads." Why did the chicken cross the road? Einstein: "Whether the chicken crossed the road or the road moved ben...
Samaritan. It tells Christian believers to be kind, even to their enemies. Most religions have stories like this. Most religions tell us to be kind to each other. These may seem like commands given with little reason. But did you know there are also scientific reasons why a person should ...
you have to be extra-extra-careful to lay out and enforce clear rules of warfare. You have toover-emphasize the need for restraint, the vital importance of distinguishing between terrorists and bystanders, if you aren’t going to blunder into self-defeating war crimes — as we did in Iraq...
We could, at long last, have a trump card to play againstDarwin. 11.自从2004年以来,美国食品与药物监管局已经批准了三种表观遗传药物的上市,这些药物被认为能在一定程度上刺激那些受疾病影响没有正常表达的肿瘤抑制基因。对于不断进行的表观遗传学研究,我们寄予重望,希望能轻扣生化开关,便能使那些在许多疾病...