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随着生命科学技术的不断发展,物种形成、生物多样性发展机制的理论探索也在不断的发展与完善。下图是科学家利用果蝇所做的进化实验,两组实验仅喂养食物不同,其他的环境条件一致,据图回答下列问题:

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    Melbourne, Australia

    Melbourne is a hotspot travel destination, and it's easy to see its beautiful beaches and busy city life.

    Why it's a great choice: Australia as a whole is considered a safe destination for international travel, and because of that, many solo travelers go there. As an English-speaking country, you won't be faced with any language barriers. Melbourne is easy to get around because you can walk or bike practically anywhere!

    Thailand

    Thailand is great for solo travelers — perhaps because it is one of the Buddhist mindsets, which promote equality among the sexes.

    Why it's a great choice: Thailand is known for its friendly atmosphere, and as a travel hotspot, there are plenty of chances to meet other like-minded travelers. Well known for being very cheap, especially in the north. A good choice if you want to get away on a budget. Thailand has a lot to offer, from the party- central Bangkok to beautiful beaches and tropical (热带的) jungle.

    Hong Kong, China

    Hong Kong is a great place to relax for solo travelers as it is full of “Zen Moments”, such as beautiful gardens and Tai Chi classes.

    Why it's a great choice: Hong Kong is regarded as one of the safest cities in the world. If you're not well traveled, or perhaps a bit tired of things like language barriers, Hong Kong is a great place to start, as it mixes both Eastern and Western at the same time.

    Bali, Indonesia

    Bali is a spiritual place with yoga, spas, healthy food and beaches. The combination of friendly people and splendid visual culture has made Bali number one tourist attraction.

    Why it's so great: you won't be the only solo traveler in Bali. Everyone is known for being extremely friendly and you're sure to meet some amazing characters along the way. As a Hindu island, Bali is the perfect place for a relaxing and spiritual retreat (静修). The Sacred Monkey Foresting Ubud is fantastic 一 if you like monkeys, anyway.