Tag: significance of transpiration

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Multiple choice biology the leaf mechanism of absorption mineral absorption significance of transpiration

Match List I with List II and select the correct answer using the codes given the lists.

List I List II
a. Dictyosomes $1$. Storage
b. Mitochondria $2$. Photosynthesis
c. Vacuoles $3$. Transport
d. Grana $4$. Secretion
$5$. Respiration
  1. A-$4$, B-$5$, C-$1$, D-$2$
  2. A-$3$, B-$4$, C-$2$, D-$1$
  3. A-$4$, B-$5$, C-$3$, D-$2$
  4. A-$4$, B-$3$, C-$1$, D-$3$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Dictyosomes are involved in secretion (4), Mitochondria are the site of respiration (5), Vacuoles are for storage (1), and Grana are the site of photosynthesis (2). This matches A-4, B-5, C-1, D-2.

Multiple choice biology the leaf mechanism of absorption mineral absorption significance of transpiration

Photosynthesis in CAM-plants in minimal because of the limited amount of _________________.

  1. $CO _{2}$ fixed at night
  2. $O _{2}$ fixed at night
  3. $O _{2}$ fixed at day light
  4. $CO _{2}$ fixed at day light
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

CAM plants fix CO2 at night to minimize water loss. The total amount of photosynthesis is limited by the amount of CO2 they can fix during the night, which is stored as organic acids.

Multiple choice biology the leaf mechanism of absorption mineral absorption significance of transpiration

With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct?

  1. Increasing atmospheric $CO _{2}$ concentration up to $0.05$% can enhance $CO _{2}$ fixation rate
  2. $C _{3}$ plants respond to higher temperatures with enhanced photosynthesis while $C _{4}$ plants have much lower temperature optimum
  3. Tomato is a greenhouse crop which can be grown in $CO _{2}$ - enriched atmosphere for higher yield

  4. None of above
Reveal answer Fill a bubble to check yourself
A Correct answer
Multiple choice biology the leaf mechanism of absorption mineral absorption significance of transpiration

What would happen if green plants disappear from earth?

  1. Only herbivores die

  2. Only carnivores die

  3. No one dies

  4. Both herbivores and carnivores die
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Green plants are the sources of food and energy for all organisms. If all green plants disappear from the earth, all the herbivores will die due to the absence of food and so will the carnivores.

So, the correct answer is option D.