首页
登录
职称英语
Like all animal species, plant species must spread their offspring to suitabl
Like all animal species, plant species must spread their offspring to suitabl
游客
2023-12-20
56
管理
问题
Like all animal species, plant species must spread their offspring to suitable areas where they
can grow and pass on their parent’s genes.
Young animals generally spread by walking or flying. 【M1】_____
Because plants don’t have that ability,
they may somehow hitchhike. Some plant seeds scatter by 【M2】_____
blowing in the wind or floating on water. Many other plant species, though, trick an animal into
carrying their seeds. How do they do? They enclose them within a tasty fruit and advertise the fruit’s
ripeness by its color or smell.
The hungry animal collects and swallows the fruit, walks or flies off, but 【M3】_____
later spits out the seeds somewhere far from its parent tree.
Seeds can thereby be carried thousands 【M4】_____
of miles. It may surprise you to learn that plant seeds can resist digestion. In fact, some seeds
actually require passage through an animal’s body before they can grow. Wild strawberries offer a
good example of hitchhiking tactic.
When strawberry seeds are still young and not yet ready to be 【M5】_____
planted, the surrounding fruit is green, sour, and hard.
When the seeds final mature, the berries turn 【M6】_____
red, sweet, and tender. The change in the berries’ color serves as a signal to birds which then eat the strawberries, fly off, and eventually spit out the seeds.
Naturally, strawberry plants doesn’t set out 【M7】_____
with a conscious intent of attracting birds only when
their seeds were ready to be dispersed away. 【M8】_____
Nor did birds set out with the intent of planting strawberries. Rather, strawberry plants evolved
through natural selection.
The sweeter and reder the final strawberry, the more birds spread its ripe 【M9】_____
seeds;the greener and more sour the young strawberry,
the birds destroyed the seeds by eating 【M10】_____
berries before the seeds were ready. [br] 【M7】
选项
答案
doesn’t改成didn’t
解析
时态不一致,应使用过去时。
转载请注明原文地址:http://tihaiku.com/zcyy/3290651.html
相关试题推荐
Thelargestanimalthateverlivedonlandorinwaterstillexists.Noteve
[originaltext]QuestionNo.6Scientistsbelievethatsomeanimalsbecomeextinc
[originaltext]QuestionNo.6Scientistsbelievethatsomeanimalsbecomeextinc
[originaltext]QuestionNo.6Scientistsbelievethatsomeanimalsbecomeextinc
[originaltext](1)One"badapple"canspreadnegativebehaviorlikeavirustob
[originaltext](1)One"badapple"canspreadnegativebehaviorlikeavirustob
Publicisinghisimminentnewseriesabouttheevolutionofanimals,SirDavi
Publicisinghisimminentnewseriesabouttheevolutionofanimals,SirDavi
Publicisinghisimminentnewseriesabouttheevolutionofanimals,SirDavi
Publicisinghisimminentnewseriesabouttheevolutionofanimals,SirDavi
随机试题
Theflowerunderthesunwould______quicklywithoutanyprotection.A、winkB、wi
Throughouthistorymanhashadtoacceptthefactthatalllivingthingsmus
Whetherit’scurledupinthefetalposition,flatonthestomachorstretch
根据《设备监理管理暂行办法》,具体负责设备监理活动管理的部门是()。A.国家
A.疫情措施 B.疫区 C.疫情通报 D.疫情报告 E.疫点传染病在人群
DIC早期最常用的抗凝药物是A.阿司匹林 B.潘生丁 C.肝素 D.速避凝
左边给定的是纸盒的外表面,由它折叠而成的一项是: A.如上图所示 B.如上图
2020年6月至2021年3月,规模以上工业原油产量平均每月新增多少万吨?A
()的根本特点是自下而上,原有经验结构是下位结构,新的经验结构是上位结构。 A
挫伤治疗原则
最新回复
(
0
)