Description : The exchange of gases takes place in the leaves through these pores for the purpose of photosynthesis. These pores are called – (1) Guard Cells (2) Stomata (3) Chloroplast (4) None of the above
Last Answer : (2) Stomata Explanation: Stomata are tiny pores present on the surface of the leaves via which exchange of gases takes place in the leaves for the purpose of photosynthesis. However, exchange of gases also occurs across the surface of stems, roots and leaves as well.
Description : What is the function of the stomata in plant leaves?
Last Answer : A: The stomata are responsible for regulating gas exchange (oxygen and carbon dioxide) in and out of the plant.
Description : (a) Leaves of a healthy potted plant were coated with vaseline to block the stomata. Will this plant remain healthy for long? State three reasons for your answer. (b) State any two differences between autotrophic nutrition and heterotrophic nutrition. -Biology
Last Answer : (a) No, this plant will not remain healthy for long. The plant will begin to die because (i) Gaseous exchange will not take place. (ii) No absorption of C02, hence no photosynthesis. (iii) Transpiration will not occur; hence no transportation of water.
Description : Grass leaves curl inwards during very dry weather. Select the most appropriate reason from the following. (a) Tyloses in vessels (b) Closure of stomata (c) Flaccidity of bulliform cells (d) Shrinkage of air spaces in spongy mesophyll
Last Answer : (c) Flaccidity of bulliform cells
Description : The process of osmosis is best illustrated by the movement of: a) salts in blood stream. b) oxygen into red blood cells. c) carbon dioxide through stomata. d) water into root hair cells.
Last Answer : ANSWER: D -- WATER INTO ROOT HAIR CELLS.
Description : Through their effects on plant growth regulators, what do the temperature and light control in the plants? (a) Apical dominance (b) Flowering (c) Closure of stomata (d) Fruit elongation
Last Answer : (b) Flowering
Description : Reduced leaves and sunken stomata are the main feature of which thing? -Do You Know?
Last Answer : answer:
Description : The types of stomata mostly present on lower surface of leaves
Last Answer : Ans. Potato type
Description : Leaves of many grasses are capable of folding and unfolding because (1) their mesophyll is not differentiated into palisade and spongy parenchyma (2) they have stomata on both sides of the leaf (3) they have high levels of silica (4) they have specialised bulliform cells
Last Answer : (4) they have specialised bulli-form cells Explanation: Bulliform cells are large, bubbleshaped epidermal cells that occur in groups on the upper surface of the leaves of many grasses. These cells, by their turgor changes, cause rolling and unrolling of the leaves thus regulating water loss.
Description : Name the tiny pores present on the surface of leaves in plants. (1) Pits (2) Stomata (3) Trichomes (4) Hydathodes
Last Answer : (2) Stomata Explanation: Stomata are pores in the surface of the leaf. The pore is surrounded by two guard cells. When these two guard cells take up water, they bend and open up the pore between them.
Last Answer : (2) Stomata Explanation: Stomata are tiny openings or pores in plant tissue that allow for gas exchange. Stomata are typically found in plant leaves but can also be found in some stems.
Description : Stomata open and close due to (a) circadian rhythm (b) genetic clock (c) pressure of gases inside the leaves (d) turgor pressure of guard cells
Last Answer : (d) turgor pressure of guard cells.
Description : Conifers are adapted to tolerate extreme environmental conditions because of (a) broad hardy leaves (b) superficial stomata (c) thick cuticle (d) presence of vessels.
Last Answer : (c) thick cuticle
Description : Reduced leaves and sunken stomata are the main feature of which thing?
Last Answer : Xerophytes
Last Answer : they have specialised bulliform cells
Last Answer : Stomata
Description : (a) “The breathing cycle is rhythmic whereas exchange of gases is a continuous process”. Justify this statement. (b) What happens if conducting tubes of circulatory system develops a leak? State in brief, how could this be avoided? (c) How opening and closing of stomata takes place? -Biology
Last Answer : (a) The breathing cycle involves inhalation and exhalation of air due to alternate expansion and contraction of thoracic cavity. Thus it is a rhythmic process. But exchange of gases is a continuous process ... pore opens up. When water moves out the guard cells shrinks and the stomatal pore closes.
Description : What is able to diffuse through the stomata?
Last Answer : Need answer
Description : Which among the following parts of a plant is involved in gaseous exchange? (1) Stomata (2) Lenticels (3) Vacuoles (4) Stomata & Lenticels
Last Answer : (4) Stomata & Lenticels Explanation: Plants obtain the gasesthey need through their leaves. They require oxygen for respiration and carbon dioxide for photosynthesis.
Description : In which of the following plant sunken stomata are found? (a) Nerium (b) Hydrilla (c) Mango (d) Guava
Last Answer : (a) Nerium
Description : Which of the following structures is involved in gaseous exchange in woody stem of a plant? (a) Stomata (b) Lenticel (c) Hydathode (d) Epidermis
Last Answer : (b) Lenticel
Description : Stomata of a plant open due to (a) influx of potassium ions (b) efflux of potassium ions (c) influx of hydrogen ions (d) influx of calcium ions.
Last Answer : (a) influx of potassium ions
Description : In Pinus plant, stomata are a. Sunken b. Bulged out c. Absent d. Rarely present
Last Answer : a. Sunken
Description : (a) Draw a labelled diagram of stomata. List two functions of stomata. (b) What are the raw materials used during photosynthesis? Write chemical equation for photosynthesis. -Biology
Last Answer : Answer.(a) (i) Gaseous exchanges between plant and the atmosphere. (ii) Plant loses water through stomata which helps in movement of minerals from soil to leaves. (b) Raw materials for ... getting average light of 10-12 hrs a day. The chemical equation for photosynthesis is as follows:
Description : In most plants stomata on a leaf must be during open the Calvin-Benson cycle.?
Description : The plants which open their stomata during night for taking CO4 are known as (A) C3 (B) CAM (C)C4 (D) All of above
Last Answer : (B) CAM
Description : Stomata of CAM plants (a) are always open (b) open during the day and close at night (c) open during the night and close during the day (d) never open.
Last Answer : (c) open during the night and close during the day
Description : when both stresses (water and heat) comes at the same time then what happens to stomata? -Biology
Description : Water stress causes stomata to (A)____ hence reducing the (B)_____ availability.
Last Answer : Water stress causes stomata to (A)____ hence reducing the (B)_____ availability.
Description : If you forgot to water a houseplant for a few days would the stomata be open or closed?
Description : What does the stomata open? (I) When the guard cells are in flaccid condition (ll) When there is an accumulation of K ions in the guard cells (III) When water enters into the guard cells (IV) When the water potential of ... of adjacent cells (A) II, III and IV I and IV (B) I and III (C) (D) None
Last Answer : (A) II, III and IV
Description : ________ is a temporary pass through account held by a third party during the process of a transaction between two parties. A. Savings Bank Account B. Current Account C. Deposit Account D. Escrow Account E. None of the Above
Last Answer : D. Escrow Account Explanation: Escrow Account: Account in which funds are accumulated for specific disbursements. It is a temporary pass through account held by a third party during the process of a transaction between two parties.
Description : The process in which soil water lost from leaves of plants in the form of vapour and enters the surrounding atmosphere.
Last Answer : Ans.Transpiration
Description : What is the function of the stomata?
Last Answer : A: Stomata are tiny pores found on the leaves of plants that regulate gas exchange, allowing carbon dioxide to enter the leaf for photosynthesis while also allowing oxygen and water vapor to exit.
Last Answer : A: The stomata are small openings on the surface of leaves that allow for gas exchange, specifically the uptake of carbon dioxide for photosynthesis and the release of oxygen and water vapor.
Description : (a) Draw a diagram to show open stomatal pore and label on it: (i) guard cells (ii) chloroplast (b) State two functions of stomata. (c) How do guard cells regulate the opening and closing of stomatal pore? -Biology
Last Answer : (a) (b) Two functions of stomata are: (i) Exchange of gases between the plant and the atmosphere takes place through stomata. (ii)Transpiration in plants takes place through stomata. ( ... through these stomata, the plant closes these pores when it does not require carbon dioxide for photosynthesis.
Description : What is the function of guard cells of stomata? -Science-7
Last Answer : Each stoma is surrounded by two guard cells. These guard cells control the opening and closing of stomata.
Description : What are stomata? -Biology
Description : Where do we find stomata? -Biology
Description : What are the functions of stomata? -Biology
Description : How do plants respiration occur at night as stomata are closed? -Biology
Description : Difference between lenticels and stomata. -Biology
Description : Similarities between lenticels and stomata. -Biology
Description : Stomata and mesophyll cells gas exchange? -Biology