首页
登录
职称英语
The occurrence of dense aggregations of the fruit-bearing tree Brosimum alic
The occurrence of dense aggregations of the fruit-bearing tree Brosimum alic
游客
2024-01-10
14
管理
问题
The occurrence of dense aggregations of the fruit-bearing tree Brosimum alicastrum on or near Maya ruin complexes in Central America was initially interpreted as evidence of ancient Maya silviculture, i.e., the stands were relics of orchards planted by the Maya. Later work, however, suggested that the stands resulted from the Artibeus bats that roost among the ruins. The bats fly to the forest, collect the fruit, bring it back to their roost, eat the fruit, and then discard the undamaged seed.
The continual input of bat-dispersed seed
has maintained the clumps of B. alicastrum around ruins for many hundreds of years.
This observation, however, does not negate the possibility that B. alicastrum was used and managed by the Maya. In fact, if we examine the behavior, rather than the density or location, of these tree populations, we are presented with strong evidence of deliberate genetic improvement. This is especially notable in the B. alicastrum trees that cluster around the Maya ruins at Tikal in Guatemala: these trees’ productivity is almost twice that of trees in Veracruz, Mexico, under almost identical environmental conditions. [br] The passage implies which of the following about the B. alicastrum trees observed in Veracruz?
选项
A、They are a product of selective breeding.
B、Their development has been influenced by bat behavior.
C、They bear an inferior quality of fruit.
D、They are poorly suited to the growing conditions at Veracruz.
E、They diffuse significantly from the trees at Tikal in their genetic makeup.
答案
E
解析
根据文章最后一句,季卡尔的树和韦拉克鲁斯的树在生长环境方面几乎一样,但是季卡尔的树生产力更强,这说明两者的基因组成不同,选项E正确。
转载请注明原文地址:https://tihaiku.com/zcyy/3349383.html
相关试题推荐
A、Theintelligenceisomniscientwithregardtomentalandphysicaloccurrences,
Favorableenvironmentsdonotnecessarilyleadtotheoccurrenceofplantcu
Favorableenvironmentsdonotnecessarilyleadtotheoccurrenceofplantcu
Theoccurrenceofdenseaggregationsofthefruit-bearingtreeBrosimumalic
Theoccurrenceofdenseaggregationsofthefruit-bearingtreeBrosimumalic
Theoccurrenceofdenseaggregationsofthefruit-bearingtreeBrosimumalic
随机试题
Alandfreefromdestruction,pluswealth,naturalresources,andlaborsupp
Itwaswhileshewasreadingabookinherstudy______athiefbrokeintotheh
[originaltext]M:Hello,Mary.W:Hi,John.Now,let’sbeginwithaquestion.It
土质边沟连续长度过长时,宜分段设横向排水沟将水流引离路基,分段长度一般不超过(
下列方剂中重用生姜的是A.小建中汤B.吴茱萸汤C.实脾散D.健脾丸E.温经汤
用于酶免疫技术的HRP,其RZ值应大于A.1.0B.2.0C.3.0D.4.0E
患儿,男,四岁。体重16kg,身高98cm,智能发育正常,现在幼儿园学习。此期心
下边四个图形中,只有一个是由上边的四个图形拼合(只能通过上、下、左、右平移)而成
痛风的临床表现不包括A.尿酸性尿路结石 B.痛风石及慢性痛风性关节炎 C.痛
经营凭证管理是道路行政管理的一项重要内容,道路客运经营凭证主要包括( )。A.班
最新回复
(
0
)