问题 选择题

下列有关生命的发生和发展的说法错误的是(  )

A.原始海洋是生命诞生的摇篮

B.生物化石为生物进化提供了直接的证据

C.自然选择学说是生物进化理论的核心

D.现代入可划分为蒙古利亚人、高加索人、澳大利亚人3个人种

答案

A、在原始大气中,无机小分子物质在紫外线、闪电等条件的激发下,形成了一些有机小分子物质,这些物质随着降雨汇入原始海洋.在原始海洋中,这些有机小分子物质经过长期积累并相互作用,形成了复杂的有机大分子物质,这些物质逐渐聚集并在外表形成了与周围海水隔开的原始界膜,构成相对独立的体系,这种体系一旦实现原始的新陈代谢和个体增殖,便意味着原始生命诞生了,所以原始生命是在原始海洋中诞生的.故不符合题意.

B、化石是保存在地层中的古代生物的遗体、遗物或生活痕迹.它记载着生物进化的历史,是研究生物进化的最直接的证据.故不符合题意.

C、达尔文自然选择学说的内容主要意思有四点,即过度繁殖、生存斗争、遗传和变异、适者生存. 现代生物进化理论的主要内容是以达尔文的自然选择学说为核心建立起来的,主要内容有四点:种群是生物进化的基本单位,突变和基因重组为生物进化提供原材料,自然选择决定生物进化的方向,隔离导致物种的形成.所以说自然选择学说是生物进化理论的核心.故不符合题意.

D、按照一般的分类方法,现代入类可分为四个种族:蒙古利亚人、高加索人、尼格罗人、澳大利亚人四个人种.故符合题意.

故选:D

单项选择题
问答题

Once a circle missed a wedge. The circle wanted to be whole, so it went around looking for its missing piece. But because it was incomplete and therefore could roll only very slowly, it admired the flowers along the way. It chatted with worms. It enjoyed the sunshine. It found lots of different pieces, but none of them fit. So it left them all by the side of the road and kept on searching. Then one day the circle found a piece that fit perfectly. It was so happy. Now it could be whole, with nothing missing. It incorporated the missing piece into itself and began to roll. Now that it was a perfect circle, it could roll very fast, too fast to notice flowers or talk to the worms. (46) When it realized how different the world seemed when it rolled so quickly, it stopped, left its found piece by the side of the road and rolled slowly away.
(47) The lesson of the story, I suggested, was that in some strange sense we are more whole when we are missing something. The man who has everything is in some ways a poor man. He will never know what it feels like to yearn, to hope, to nourish his soul with the dream of something better. He will never know the experience of having someone who loves him give him something he has always wanted or never had.
(48) There is a wholeness about the person who has crone to terms with his limitations, who has been brave enough to let go of his unrealistic dreams and not feel like a failure for doing so. There is a wholeness about the man or woman who has learned that he or she is p enough to go through a tragedy and survive, she can lose someone and still feel like a complete person. Life is not a trap set for us by God so that he can condemn us for failing. Life is not a spelling bee, where no matter how many words you’ve gotten right; you’re disqualified if you make one mistake. (49) Life is more like a baseball season, where even the best team loses one third of its games and even the worst team has its days of brilliance. Our goal is to win more games than we lose.
When we accept that imperfection is part of being human, and when we can continue rolling through life and appreciate it, we will have achieved a wholeness that others can only aspire to. (50) That, I believe, is what God asks of us—not "Be perfect", not "Don’t even make a mistake", but "Be whole."