问答题SECTION 4
There are ten questions below
Effects of urban environments on animals
Introduction
Recent urban developments represent massive environmental changes. It was previously thought that only a few animals were suitable for city life, e.g.
• the 【B1】________ 一 because of its general adaptability
• the pigeon - because walls of city buildings are similar to 【B2】________In fact, many urban animals are adapting with unusual 【B3】________
Recent research
• Emilie Snell-Rood studied small urbanised mammal specimens from museums in Minnesota.
- She found the size of their 【B4】________had increased.
- She suggests this may be due to the need to locate new sources of 【B5】________and to deal with new dangers.
• Catarina Miranda focused on the 【B6】________of urban and rural blackbirds.
- She found urban birds were often braver, but were afraid of situations that were 【B7】________.
• Jonathan Atwell studies how animals respond to urban environments.
- He found that some animals respond to 【B8】________by producing lower levels of hormones.
• Sarah Partan's team found urban squirrels use their 【B9】________ to help them communicate.
Long-term possibilities
Species of animals may develop which are unique to cities. However, some changes may not be 【B10】________.
【B1】