首页
登录
职称英语
The cycle of fluctuation in snowshoe hare populations is unusual among anima
The cycle of fluctuation in snowshoe hare populations is unusual among anima
游客
2024-01-10
63
管理
问题
The cycle of fluctuation in snowshoe hare populations is unusual among animal species in that it is remarkably regular—peaking every eight to eleven years—and broadly synchronized over a vast area. Declines from peak levels are initiated by markedly lower overwinter survival of young hares, sharp decreases in birth rates, and a declining survival rate for adult hares. The onset of population increases is brought about by greatly improved rates of survival and birth.
Some biologists hypothesize that the cycle begins when peak snowshoe hare populations exceed their winter food supply; resulting malnutrition triggers a population decline. As hare numbers fall, the ratio of predators to hares increases, as does the impact of predation on the hare population. This extends the decline beyond the period of winter food shortage. Hare scarcity then causes predator population declines, and with fewer predators and more abundant winter food, the hare population begins another cyclic increase. The high mobility of predators responding to local differences in hare abundance contributes to interregional synchrony. [br] According to the passage, biologists have suggested which of the following about snowshoe hare population fluctuations?
选项
A、Their regularity is due to the persistent threat of malnourishment that young hares face.
B、They are similar in length to those of other species of hare.
C、Their synchrony can be partly explained by the ability of predators to change the areas in which they hunt.
D、Their variation from region to region is partly due to regional differences in the availability of alternate prey for predator.
E、Their regularity is due to the constant availability of the food sources hares rely on.
答案
C
解析
C正确,对应最后一句。
转载请注明原文地址:https://www.tihaiku.com/zcyy/3349358.html
相关试题推荐
Thespatialdistributionofdifferentracialandethnicpopulations
Thespatialdistributionofdifferentracialandethnicpopulations
Thespatialdistributionofdifferentracialandethnicpopulations
Thespatialdistributionofdifferentracialandethnicpopulations
Intheclassroom,Carolwasunusually______;ontheplayground,however,shebec
Althoughitisunusualtodenouncemuseum-goersfornotpainting,itisquiteco
Thecycleoffluctuationinsnowshoeharepopulationsisunusualamonganima
Thecycleoffluctuationinsnowshoeharepopulationsisunusualamonganima
Recentlyanunusuallyhighnumberofdolphinshavebeenfounddeadofinfect
Computerprogramsareunusualinthattheyarevirtuallytheonlyproductst
随机试题
SevenWaystoCreateaHappyHouseholdEveryfamilyisd
TheAmericanbabyboommadeunconvincingU.S.advicetopoorcountriesthat
某设备工程项目,业主委托某设备监理公司承担该设备工程的招标工作和全过程监理任务。
美术教材应当具有( ),以适应不同地区的教师和学生的需要。A.地方性限制 B
下列各项,不属应与崩漏鉴别的疾病是A.月经先期 B.月经过多 C.经间期出血
护士应该获得的信息是:静脉滴注给予氯化钾,其浓度不可超过A:0.1%~0.2%
左边给定的是削掉一个角的纸盒,下列哪一项不是有它展开而成? A.见上图
下列观念中,与“认知结构”含义基本相同的有A.赫尔巴特的“统觉团” B.托尔曼
A.抽搐、进行性加重 B.出血、凝血时间延长 C.恶心、呕吐、口内有金属味
根据支付结算法律制度的规定,关于存款人基本存款账户的下列表述中,不正确的是()
最新回复
(
0
)