本區搜索:
Yahoo!字典
打印

[Bio] please help! 4 mc questions

[隱藏]

please help! 4 mc questions

05 (28)
Why (d) isn't correct? Isn’t urea will loss with heat from the
human   body?
05(39)
Why (3) will not bend towards left?
00(57)
Why (b) and (d) isn’t correct?
92(39)
Why pollen grain is haploid?
I understand that it carries gametes which is haploid, but
isn’t the outer surface of pollen grain is diploid?


thx!!!!

[ 本帖最後由 VS2010 於 2010-5-9 11:39 PM 編輯 ]
   

TOP

post qestion plx

TOP

the photos are 05(28) and (39)

00(57)
in the same cycle , the peak of the lynx population is always lower than that of the hare
population.This is because
A.hunting reduces the population of the lynx.
B.the hare has fewer predators than the lynx.
C.the hare has more food supply than the lynx.
D.the hare competes more successfully with the lynx for food.

92(39)
if the diploid chromosome number of a flowering plant is 24, which of the following structure has
12 chromosomes?
A. an amther
B. an embryo
C. a   stigma
D. a   pollen grain

[ 本帖最後由 VS2010 於 2010-5-9 11:43 PM 編輯 ]
附件: 您所在的用戶組無法下載或查看附件

TOP

05(28)
loss of heat唔一定係evaporation.
可以conduction,radiation.

05(39)
概括黎講,auxin好似係係tip果到郁埋一邊,
再diffuse to elongation region
E+佢個tip隔住左,
冇得郁埋一邊,so冇bending

TOP

92(39)
咁你會唔會話精子既表面係diploid??

TOP

why the auxin can't move like that?
附件: 您所在的用戶組無法下載或查看附件

TOP

92(39)
pollen grain is haploid
植物結構同人&動物唔同
唔可以放埋一齊諗
佢無錯.
呢樣野某程度上out syl
不過你可以排除其他ans得出呢個ans
所以無乜所謂啦

TOP

回覆 #6 VS2010 的帖子

block住左咪無得郁
無得解架喎-.-
佢又唔識睇路行點識過去呀

TOP

回覆 #5 hunglit914 的帖子

Sperm itself is the gamete but the pollen grain is just the carrier,
isn't it just something like a bag which is different from
the gamete?

TOP

Thanks for both death_kg and hunglit914 help
But anybody could tell me

Why (b) and (d) isn’t correct? in 00(57)
(the photo is in #3)

TOP

重要聲明:小卒資訊論壇 是一個公開的學術交流及分享平台。 論壇內所有檔案及內容 都只可作學術交流之用,絕不能用商業用途。 所有會員均須對自己所發表的言論而引起的法律責任負責(包括上傳檔案或連結), 本壇並不擔保該等資料之準確性及可靠性,且概不會就因有關資料之任何不確或遺漏而引致之任何損失或 損害承擔任何責任(不論是否與侵權行為、訂立契約或其他方面有關 ) 。