Tag: mineral absorption

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

Carbohydrates, the most abundant biomolecules on earth are produced by

  1. Some bacteria, algae and green plants

  2. Fungi, algae and green plants

  3. All bacteria, fungi and algae

  4. Viruses, fungi and bacteria
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Carbohydrate synthesis occurs through photosynthesis Chloroplasts are the green plastids which occur in all the green parts of the plants. They are the actual site of photosynthesis. 

Cyanobacteria and other photosynthetic bacteria do not possess chloroplasts. However, the photosynthetic pigments of these organisms are located on thylakoids which lie freely in the cytoplasm.
The algae also contain the chloroplasts to perform the photosynthesis.
Fungi are either saprophytic, symbiotic or parasitic organisms. Viruses are parasitic.
Hence, the correct answer is 'Some bacteria, algae and green plants'.

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

Photosynthesis is essential for survival of

  1. Animals

  2. Plants

  3. Most of the organisms

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Photosynthesis is plants taking in water, carbon dioxide, and light to make sugar and oxygen. This is important because all living things need oxygen to survive. All producers make oxygen and sugar for the secondary consumers and then the carnivores eat animals that eat the plants. If there is not enough producers to make the sugar and oxygen that all living things need then all living things will die out. Without producers CO2 couldn't be taken in by the plants to be turned back into oxygen that all animals need for survival. Also, without producers, herbivores wouldn't have anything to eat and they would all die leaving carnivores without food to eat and all life forms wouldn't be on Earth. Photosynthesis happens in the Chloroplast of the plant's organelle, if the Chloroplast wasn't in the plant Photosynthesis couldn't happen. If there was no sunlight for the plant to absorb then Photosynthesis couldn't happen. If living things didn't breathe out CO2 then the plants would die and living things would have no way of getting oxygen. These are the reasons why Photosynthesis is important to plants and all loving things on the planet.

So, the correct option is 'Option D'.
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.