问题 解答题

蚂蚁是营群体生活的昆虫.每个群体中有蚁后、雄蚁和工蚁.蚁后的主要职能是产卵、繁殖后代;雄蚁的职能是与蚁后交配,工蚁的主要职能是筑巢,觅食、护卵、饲喂幼蚁、保卫等.根据动物的行为特点,分析回答.

(1)蚂蚁的身体由很多______构成的.

(2)一只蚂蚁发现食物后,会迅速返回巢穴.不一会儿,一大群蚂蚁排着长长的队伍,“浩浩荡荡”地奔向食物所在的地点,它靠______传递信息.(填“语言”、“动作”或“气味”)

(3)小明说:“像蚂蚁这样的群体中的分工合作需要随时交流信息.”你认为小明说得对吗?答:______.

(4)像蚂蚁一样营社群生活的动物,群体内部往往形成一定的组织,成员之间有明确的分式,有的群体还形成等级,这是______的重要特征.(填“学习行为”、“先天性行为”或“社会行为”)

(5)哪些动物像蚂蚁一样营社群生活?请举出其中一例.答:如______.

答案

社会行为是群体内形成了一定的组织,成员间有明确分工的动物群集行为,有的高等动物还形成等级.

(1)节肢动物身体由很多体节构成,有外骨骼、足和触角分节.蚂蚁属于节肢动物昆虫,因此蚂蚁的身体由很多体节构成的.

(2)动物通讯,就是指个体通过释放一种或是几种刺激性信号,引起接受个体产生行为反应.信号本身并无意义,但它能被快速识别,更重要的是它代表着一系列复杂的生物属性,如性别、年龄、大小、敌对性或友好性等等.动物通过动作、声音、气味、分泌物(性外激素)进行信息交流.因此把动作、声音、气味、分泌物(性外激素)叫做动物语言.蚂蚁靠气味传递信息.

(3)动物通讯是群体成员之间密切合作的前提,因此“像蚂蚁这样的群体中的分工合作需要随时交流信息.”

(4)像蚂蚁一样营社群生活的动物,群体内部往往形成一定的组织,成员之间有明确的分式,有的群体还形成等级,这是社会行为的重要特征.

(5)蜜蜂、狒狒、猴群等动物像蚂蚁一样营社群生活.(举出任意一种营社群生活动物则可)

故答案为:

(1)体节;

(2)气味;

(3)对; 

(4)社会行为; 

(5)蜜蜂.

阅读理解

There are many kinds of food in the world. Scientists learn a lot about them. They say that there are some kinds of food people must eat every day. For example, people must eat some green and yellow vegetables. We shouldn't eat too much meat. People also need to eat some fruits, bread and rice. Of course our bodies need some water and milk.

Scientists say people in different countries and different places eat different kinds of food. They cook food in different ways. Different people eat at different times. In one place, people eat once or twice a day. But in another place, people eat three or four times. The scientists say when to eat and how many times to eat are not important. What we eat is the most important thing.

Nowadays(现在), the world faces two problems. People in some places, for example, in Africa, are not full. Many people are eating junk food. It's bad for people's health. So it's our duty to make everyone full and make everyone healthy.

小题1:            know about food most according to the passage.

A.Farmers

B.Cooks

C.Scientists

D.Doctors小题2: Scientists think the most important thing about food is             .

A.how to cook

B.when to eat

C.what to eat

D.how often to eat小题3: Which of the following statements(陈述) is NOT true?

A.Every day, we should eat some vegetables.

B.All the people in the world have enough food to eat.

C.Many people are eating unhealthy food.

D.Everyone is needed to help solve (解决) the two problems.小题4:            is not good for our health.

A.Water

B.Bread

C.Milk

D.Junk food

单项选择题