问题 判断题

细菌和真菌都是靠分裂生殖来传宗接代(   )

答案

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本题考查的知识点是细菌与真菌的区别。

细菌的基本结构包括:细胞壁、细胞膜、细胞质、遗传物质;真菌的基本结构包括:细胞壁、细胞膜、细胞质、细胞核等。故真菌和细菌在细胞结构上的明显区别是有无成形的细胞核。

从生殖方式上看,细菌的生殖方式是分裂生殖,一个细菌分成两个细菌,而大部分的真菌靠产生大量的孢子进行繁殖,也有少数能进行出芽生殖,如酵母菌;孢子在温度、湿度等条件适宜的情况下能够萌发长出新的个体,这样的繁殖方式叫孢子生殖。故错误。

阅读理解

Most drinks stating that they are fruit­ flavored (水果味道的) contain no fruit at all, while most of the rest contain only a small quantity of fruit, according to a study carried by the British Food Commission.

“Shoppers need to check the labels (标签) before buying drinks, though sometimes the actual content can be non­existent,” said Food Commission spokesperson Ian Tokelove. “Food production is highly competitive. __1__ It will increase profits, and consumers won't always realize they are being tricked.”

Flavorings are focused on the flavors of natural food products such as fruits, meats and vegetables, or creating flavor for food products that do not have the desired flavors. Researchers analyzed the contents of 28 strawberry­ flavored products sold in stores.    __2__  Of the 11 products that did contain strawberries, five of them contained less than one percent real fruit. In addition, each juice box contained nearly eight teaspoons of sugar.

__3__ Let's take jam as an example. Some strawberry­ flavored jam was labeled as containing no artificial colors, flavors, or sweeteners, but it contained absolutely no strawberries at all.

__4__ Consumers have the rights to know clearly about what they have bought. Under current UK law, food packages do not have to distinguish between natural and artificial flavoring. “Describing a product as strawberry flavor and covering the surface of the packet with pictures of strawberries is misleading.   __5__ Unfortunately, it is also legal and widespread,” Tokelove said. “It's time to take measures to protect the consumers' rights.”

A.The products which contain real fruit are popular with people.

B.Even products advertised as more natural often contained no fruit.

C.They found that about 60 percent of them didn't contain any fruit at all.

D.If companies can cut their costs by using flavoring, they are likely to do so.E. It is important and necessary to demand a small amount of flavoring in the products.

F. Actually the product contains just a tiny percentage of strawberry or even no fruit at all.

G. The Food Commission suggested all flavors used in a product should be listed on the packaging.

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