问题 连线题

将所选答案填在相应的括号内

①田鼠       a.交配→产卵→孵卵→育雏          ①——(   )

②蝴蝶       b.交尾→产卵→若虫→成虫          ②——(   )

③家鸽       c.交尾→产卵→幼虫→蛹→成虫      ③——(   )

④青蛙       d.交配→怀胎→产仔→哺乳          ④——(   )

⑤蝗虫       e.抱对→产卵→蝌蚪→成体          ⑤——(   )

答案

①——d ②——c ③——a ④——e ⑤——b

题目分析:蝴蝶属于昆虫,发育是完全变态发育,其发育过程是:交尾→产卵→幼虫→蛹→成虫;

蝗虫属于昆虫,发育是完全变态发育,其发育过程是:交尾→产卵→若虫→成虫;

不同鸟类的生殖和发育过程有所不同,如有些鸟类杜鹃鸟就不筑巢、孵卵、育雏,但都必须要具备求偶、交配、产卵的行为.家鸽是鸟类,其繁殖过程为:交配→产卵→孵卵→育雏;

青蛙的生殖发育过程为:雄蛙先鸣叫吸引雌蛙,雌蛙来后雌雄蛙抱对,促进两性生殖细胞排出,两性生殖细胞在水中结合形成c受精卵,许多受精卵在一起形成卵块,受精卵孵化出小蝌蚪,小蝌蚪先长后肢,再长前肢,最后尾巴逐渐消失,变成小幼蛙,幼蛙逐渐长成成蛙.即受精卵→蝌蚪→幼蛙→成蛙.青蛙的幼体生活在水中,主要用鳃呼吸,成体既能生活在水中也能生活在潮湿的陆地上,用肺呼吸,皮肤辅助呼吸,青蛙的幼体和成体在外部形态、内部结构和生活习性上都有很大变化,这种发育过程叫变态发育;

田鼠是哺乳动物,其生殖和发育特点是:交配→怀胎→产仔→哺乳

单项选择题
阅读理解

A. Adults keep pets with their children

B. Pet keeping has a very long history

C. Pet-keeping may do hard to animals

D. People keeps pet for their aesthetic need

E. Caged pets become increasingly popular

F. Pet-keeping is helpful for children’s growths

小题1:___________ 

Pet-keeping is a time-honored tradition. One of the reasons for people to raise to raise dogs or cows was usefulness. While people in the past hunted animals and kept them in their backyards, the civilized man today is less cruel towards them and is less exploitative(利用的).

小题2:___________ 

We keep animals as pets because they are attractive. We all have the urge to possess something that has aesthetic value, and that is why we treasure paintings or fine furniture. Keeping pets is one form of this urge. A Siamese cat in the house can be a decorative objective. Pets are playful animals and they amuse us. A little rabbit amuses us by its playful and lively runs.

小题3:___________ 

Many parents find it helpful to have pets in  their house and for their children. Having pets is an excellent way of developing in children the love of animals and responsibility. Children get the opportunity to take on full responsibility for another creature’s life. It will be an educational experience for a child to watch the natural life cycle of an animal. There are psychological benefits for children. Pets are welcome friends for children who are lonely. Pets are excellent companions. Keeping pets means giving love and being loved. We find comfort in giving care and receiving care in return. We get pleasure from their appreciation and their behavior.

小题4: ___________ 

As more people move into apartments, there are limitations on keeping of animals like dogs and monkeys. Therefore, caged animals have increased in popularity. Birds fall into this type. We keep them for their beautiful songs and feathers. Fishing keeping is a widespread hobby and the keeper can observe their behavior in the glass tank and study its entire life cycle. The cat is a fine house pet and it fits neatly into human habitation(居住地) without requiring its own cage. They are wonderful hunters, if there are rats around.

小题5:___________ 

Pets satisfy man’s desire to care for a bit of nature. The pet owner has the responsibility for supplying those needs nature provides. Pets are amusing and entertaining, but we are in a way doing animals harm by making them live in a human environment. Are we not enslaving(奴役)them?