2017 DSE Bio 討論區

原來apple唔係ovary出嚟
係receptacle
所以上面條野係from flower stalk
下面係from sepal

宜家先g ?

Hi

原來apple唔係ovary出嚟
係receptacle
所以上面條野係from flower stalk
下面係from sepal

呢個真係唔知
好似士多啤梨都唔係由ovary出嚟

都係岩岩google
Pineapple from receptacle
Apple from hypanthium

不過，我地都唔識原理 if fruit is developed from other parts of plant, not fertilzed ovaries...

咁應該唔洗識，我本身以為apple係ordinary example。

覺得plant reproduction煩撚到仆街

啲圖好正 thanks巴打

Chloroplast

Recall the site for corresponding processes in photosynthesis.
Particularly note how the grenna is interconnected and its significance.

巴打依個點答

Chloroplast

Recall the site for corresponding processes in photosynthesis.
Particularly note how the grenna is interconnected and its significance.

巴打依個點答

The grana are interconnected by intergrana
- to allow the efficient transport of photosynthetic product within the chloroplast.

唔該想問問2012 dse mc第2條
plant carry out photosynthesis to produce glucose which is required for the formation of
(1) cellulose (2)protein (3)starch
答案係1、2、3
但係出黎既glucose唔係淨係可以變carbohydrates 咩？
我本textbook係由intermediate of photosynthetic reactions 變protein
而唔係由glucose變protein

唔該想問問2012 dse mc第2條
plant carry out photosynthesis to produce glucose which is required for the formation of
(1) cellulose (2)protein (3)starch
答案係1、2、3
但係出黎既glucose唔係淨係可以變carbohydrates 咩？
我本textbook係由intermediate of photosynthetic reactions 變protein
而唔係由glucose變protein

當然唔係由glucose直接變protein，係要經過好多step，而題目應該包含埋呢個意思。

唔該想問問2012 dse mc第2條
plant carry out photosynthesis to produce glucose which is required for the formation of
(1) cellulose (2)protein (3)starch
答案係1、2、3
但係出黎既glucose唔係淨係可以變carbohydrates 咩？
我本textbook係由intermediate of photosynthetic reactions 變protein
而唔係由glucose變protein

當然唔係由glucose直接變protein，係要經過好多step，而題目應該包含埋呢個意思。

Protein唔係amino acid咩 睇書話係3-c compund through respiration變amino acid再變protein

唔該想問問2012 dse mc第2條
plant carry out photosynthesis to produce glucose which is required for the formation of
(1) cellulose (2)protein (3)starch
答案係1、2、3
但係出黎既glucose唔係淨係可以變carbohydrates 咩？
我本textbook係由intermediate of photosynthetic reactions 變protein
而唔係由glucose變protein

當然唔係由glucose直接變protein，係要經過好多step，而題目應該包含埋呢個意思。

Protein唔係amino acid咩 睇書話係3-c compund through respiration變amino acid再變protein

我仲係學生嗰陣我剩係諗glucose經過modification之後再變amino acid，冇諗太仔細
我轉頭搵下資料點解釋 我依家唔方便住

2016 5**lm

2016 5**lm

2016 算唔算難
我見lq 幾乎題題poorly answered...

20165** 勁！
我覺得最有意思係條dichotomy

2016 5**lm

2016 算唔算難
我見lq 幾乎題題poorly answered...

20165** 勁！
我覺得最有意思係條dichotomy

我都係題題亂9咁答
出到黎唔知點解5**咗
dichotomy個題算簡單啦 我做到個題笑咗
最奇怪係determining factor個題
仲有實驗題同mineral deficiency
到而家都唔知想點

2016 5**lm

2016 算唔算難
我見lq 幾乎題題poorly answered...

20165** 勁！
我覺得最有意思係條dichotomy

我都係題題亂9咁答
出到黎唔知點解5**咗
dichotomy個題算簡單啦 我做到個題笑咗
最奇怪係determining factor個題
仲有實驗題同mineral deficiency
到而家都唔知想點

60幾歲考仲有5**
果然係MIT Harvard出身

想問點解會知道個女人係大左肚？

ANS:B

想問點解會知道個女人係大左肚？

ANS:B

energy requirement 明顯地高咗供給胎兒生長?

Practice Paper MC Q22

Which of the following are necessary for speciation?

(1) the competition within a species
(2) the existence of variation within a species
(3) different populations of a species being isolated for a long time

Ans:(2)(3)


點解1錯？ 唔該哂

想問點解會知道個女人係大左肚？

ANS:B

energy requirement 明顯地高咗供給胎兒生長?

單從energy requirements 我覺得唔可以做直接推論; 可以係labour worker

想問點解會知道個女人係大左肚？

ANS:B

energy requirement 明顯地高咗供給胎兒生長?

單從energy requirements 我覺得唔可以做直接推論; 可以係labour worker

可能仲要睇埋iron requirements

Practice Paper MC Q22

Which of the following are necessary for speciation?

(1) the competition within a species
(2) the existence of variation within a species
(3) different populations of a species being isolated for a long time

Ans:(2)(3)


點解1錯？ 唔該哂

Speciation 意思「物種產生既過程」

2/3 你知，所以唔解

1: refer to infraspecific competition
- 因為種內間競爭，species less adapted to the competition 會拎得更少食物
- smaller chance of survival =/= speciation

Practice Paper MC Q22

Which of the following are necessary for speciation?

(1) the competition within a species
(2) the existence of variation within a species
(3) different populations of a species being isolated for a long time

Ans:(2)(3)


點解1錯？ 唔該哂

Speciation 意思「物種產生既過程」

2/3 你知，所以唔解

1: refer to infraspecific competition
- 因為種內間競爭，species less adapted to the competition 會拎得更少食物
- smaller chance of survival =/= speciation

唔係natural selection咩 select variations that are better adapted to the environment

Practice Paper MC Q22

Which of the following are necessary for speciation?

(1) the competition within a species
(2) the existence of variation within a species
(3) different populations of a species being isolated for a long time

Ans:(2)(3)


點解1錯？ 唔該哂

Speciation 意思「物種產生既過程」

2/3 你知，所以唔解

1: refer to infraspecific competition
- 因為種內間競爭，species less adapted to the competition 會拎得更少食物
- smaller chance of survival =/= speciation

唔係natural selection咩 select variations that are better adapted to the environment

唔係
有natural selection =/= speciation
Like 白班/黑班 butterfly in industrial revolution

Natural selection 係會令生物more adapted to the environment =/= a new species

再講明d

Logic:
先speciation
後 natural selection

Under natural selection, among new species formed will be selected to be more adapted to the present environment with the introduction of selection pressure

Practice Paper MC Q22

Which of the following are necessary for speciation?

(1) the competition within a species
(2) the existence of variation within a species
(3) different populations of a species being isolated for a long time

Ans:(2)(3)


點解1錯？ 唔該哂

Speciation 意思「物種產生既過程」

2/3 你知，所以唔解

1: refer to infraspecific competition
- 因為種內間競爭，species less adapted to the competition 會拎得更少食物
- smaller chance of survival =/= speciation

唔係natural selection咩 select variations that are better adapted to the environment

唔係
有natural selection =/= speciation
Like 白班/黑班 butterfly in industrial revolution

Natural selection 係會令生物more adapted to the environment =/= a new species

Natural selection唔係係speication中需要咩 我睇書係咁講

Practice Paper MC Q22

Which of the following are necessary for speciation?

(1) the competition within a species
(2) the existence of variation within a species
(3) different populations of a species being isolated for a long time

Ans:(2)(3)


點解1錯？ 唔該哂

Speciation 意思「物種產生既過程」

2/3 你知，所以唔解

1: refer to infraspecific competition
- 因為種內間競爭，species less adapted to the competition 會拎得更少食物
- smaller chance of survival =/= speciation

唔係natural selection咩 select variations that are better adapted to the environment

唔係
有natural selection =/= speciation
Like 白班/黑班 butterfly in industrial revolution

Natural selection 係會令生物more adapted to the environment =/= a new species

Natural selection唔係係speication中需要咩 我睇書係咁講

個d 係already new species to become more adapted to the present environment

Same species but with different degree of phenotypic advantages

想問點解會知道個女人係大左肚？

ANS:B

energy requirement 明顯地高咗供給胎兒生長?

以Energy requirement 嚟推既話 Labour worker都得喎