In today's world, people spend a lot of money on appearance because they want to look younger. Why does this happen? Do you think this is a positive or negative development? Give reasons for your answer and include any relevant examples from your own knowledge or experience. Write at least...
Although the Indian government has been stepping up efforts to protect tigers, poaching continues to haunt the country. Before India’s independence, many British nobles considered tiger hunting a form of entertainment. After independence,...
Question 4: What does the report say about the birth of the new baby elephant? C) It was smooth. News report 3 Three years ago, a couple was enjoying a meal at a beach restaurant. The restaurant was built on a wooden structure above the sea water. During the meal, the man's weddin...
And how does natural selection subsequently act on them? Genomic data suggest that different gene classes tend to be retained after single-gene and whole-genome duplications. We also know that functional differences between duplicate genes can originate in several different ways, including mutations ...
22.A)Cultivation of new varieties of crops 23.D)The improvement of agricultural infrastructure 24.C)For turning their focus to the needs of farmers in poorercountries. 25.B)Substantial funding in agricultural research. 范文(追星) Living in anage when modern people have never attached more import...
eight-tentacled friends. On the BBC Radio 4 programme Start the Week he said that humans and the octopus have acommon ancestor. This is a term in science which means 'a creature from which both species evolved'. Like a very dist...
And one thing this exercise shows is that it does have a definite shape; it’s not just a point labelled “work hard.” 我的目的是创建一份可供所有领域的人使用的指南。同时我也对通用方法论包含哪些内容充满好奇。最终,这项尝试成功证明:通用方法论的确存在;除了“努力工作”这一条之外,通用方法论...
How does DNA encode the information for a protein? There are only four DNA bases, but there are 20 amino acids that can be used for proteins. So, groups of three nucleotides form a codon that specifies which of the 20 amino acids goes into the protein. A 3-base codon yields 64 possib...
How long does a snail live? Some snail species are known to live for up to ten years. Land snails, on the other hand, can live for about a year. Where do snail shells come from? As soon as a baby snail is born, it starts chewing the shell of the egg it hatched from. These sh...
The best of National Geographic delivered to your inbox Sign up for more inspiring photos, stories, and special offers from National Geographic.Sign Up Legal Terms of Use Privacy Policy Interest-Based Ads Our Sites Nat Geo Home Attend a Live Event Book a Trip Buy Maps Inspire Your Kids Shop...