Stomata are usually opena. at night, when the plant requires a supply of oxygen.b. during the day, when the plant requires a supply of carbondioxide.c. day or night if there is excess water in the soil.d. during the day, when transpiration occurs.e. Both b and d are correct.
Q: When humidity is high Select one: O leaves absorb moisture from the air. O transpiration rates…
A: High humidity means air surrounding the atmosphere is warmer and it has the capacity to retain…
Q: Guard cellsa. are found primarily on the upper surface of leaves.b. open their stomata by…
A: A specialized pair of plant cells that are responsible for the control of gaseous exchange in the…
Q: Stomata are openings on plants that allow for gas exchange. True False
A: Stomata are the minute openings present on the surface of the leaves. They are surrounded by two…
Q: A Vhet do we call the structures found on the root epidermis that increase the plant's capacity…
A: Roots are underground structures of plants. They absorb water and nutrients from the soil.
Q: Gas exchange occurs through microscopic pores formed by two (a) subsidiary cells (b) abscission…
A: Introduction Plants are autotrophs as they can synthesize their own food by photosynthesis. Plants…
Q: Why do land plants have stomates (sometimes called stomata)? a. To allow plants to take in carbon…
A: Introduction:- Stomata are small holes on the leaves that play an important role in gas exchange.…
Q: Guttation in plants is due to condensation of water vapor and occurs through the hydathodes. D.…
A: Guttation is a process by which plants release excess water through their leaf pores (called…
Q: Radical vascular bundles are those in which: A. xylem is surrounded by phloem B. phloem is…
A: Vascular bundles are responsible for the transport of water and photosynthates in the vascular…
Q: If all of the stomata in a plant were to close, what would happen to transpiration. O Transpiration…
A: Transpiration is a process of of loss of water in the form of vapour, from the aerial portions of…
Q: The formation of an air bubble in the xylem is called a. agitation. b. cohesion. c. adhesion.…
A: Plants are organisms with eukaryotic cells having cell walls and are capable of synthesizing their…
Q: Stomata play an important role in the homeostasis of a plant, which statement regarding stomata is…
A: Stomata is a pore present in the adaxial or lower portion of the leaves which is guided by the guard…
Q: A Which of the following is not a structure for gas exchange in plants? a. stomates b. lenticels C.…
A: Since you have asked multiple questions, we will solve the first question for you. If you want any…
Q: In vascular plants, phloem tissue primarilya. transports water.b. transports carbohydrates.c.…
A: Phloem tissue: [Vascular plants] The vascular tissue in charge of transport and…
Q: In roots, growth of lateral branches beginsa. on the root epidermis.b. on the root hairs.c. at the…
A: Root epidermis: provides protection and helps in absorption. Root hairs are extension of root…
Q: The ________ forces selective uptake of minerals in the root. a. pericycle b. epidermis c.…
A: The structure of plant roots, stems, and leaves facilitates the transport of water, nutrients…
Q: Stomata close in response to_______ . a. ABA c. bacterial flagellin b. nitric oxide d. all of the…
A: Step 1 Growth is an irreversible permanent increase in size, volume, and weight of a cell, part, or…
Q: Choose the best answer for following question. Gases, such as CO2, enter the leaf through:a.…
A: Carbon dioxide is necessary for photosynthesis in plants. Exchange of gases takes place through the…
Q: Plant bends towards the source of light on account of the movement of curvature known as: A.…
A: Plants are multicellular organism in the kingdom Plantae. Plants obtain most of their energy from…
Q: Which of the following statements is/are false? A. Water is actively transported from source cells…
A: Statements is /are false -- In plant tissues the transportation of water , nutrients and minerals…
Q: After sucrose enters sieve tubes,a. it is removed by the source.b. water follows passively by…
A: Phloem tissue which is made up of sieve tubes and companion cells is responsible for the transports…
Q: Guttation occurs in herbaceous plants when the- Select one: O root pressure exceeds transpiration…
A: Plants are the living organisms which synthesize their own food by photosynthesis. In photosynthesis…
Q: With stomata closed, a waterproof cuticle______ . a. minimizes water loss through plant surfaces b.…
A: Water molecules escape from the leaves through the process of transpiration. The cells that are…
Q: . Which of the following arise(s), directly or indirectly, frommeristematic activity?(A) secondary…
A: The full plant regeneration from any plant part by growing it in the aseptic condition is called…
Q: Root hairs____ . a. conduct water from cortex to aboveground shoots b. increase the root’s surface…
A: Roots are the underground structures of plants.
Q: The clinging of xylem sap to the xylem walls to prevent the sap from moving downward is due to…
A: The clinging of xylem sap to the xylem walls to prevent the sap from moving downward is due to…
Q: Stomata play an important role in ths homeostasis of a plant, which statement regarding stomata is…
A: Stomata are pores found on the lower surface of most plant leaves. The primary function of stomata…
Q: What are the function of stomata? O Gas exchange O Water absorption O Light absorption O Respiration
A: Stomata are little pores tracked down on the outer layer of leaves. They are important for gas…
Q: When water enters the roots via ______A_______ is is pulled toward the leaf by _____B_______. Water…
A: Water is very important part of the life and all living organism. Major water sources on earth are…
Q: The clinging of xylem sap to the xylem walls to prevent the sap from moving downward is due to…
A: The rising or ascent of sap in the xylem tissue of plants is the vertical movement of water and…
Q: High transpiration rates imply bulk flow of water through the xylem which would also be necessary to…
A: Introduction Plants need continuous supply of water and nutrients for their survival and growth.…
Q: Closed stomata______ . a. limit gas exchange c. prevent photosynthesis b. permit water loss d.…
A: Stomata are the tiny pores or openings on the surface of the leaves in plants. Stomatal openings are…
Q: Is water primarily pushed or pulled up the plant
A: Xylem and phloem are plant tissue that help in transport of substance. Xylem is involved in water…
Q: Water movement through the xylem needs less pressure than movement through living cells. A. Agree,…
A: Introduction: Water Movement Through A Plant And Evaporation From Aerial Portions Such As Leaves,…
Q: Most water moves from soil to vascular cylinder_____ . a. through root hairs c. through root cell…
A: Introduction :- Root hair cells are single tubular root cells (black arrow pointing to one of the…
Q: Approximately 10 percent of water within the atmosphere has been released by plants by…
A: Water movement from the root toward the upper parts of the plants occurs when the water in the upper…
Q: During active transpiration the pressure potential of the xylem is: Select one: O positive due to…
A: In 1994 Henry h Dickson and iris botanist and John jolly a physicist developed the idea of ascent…
Q: The primary growth of a plant is due to the action of the ________. a. lateral meristem b. vascular…
A: A meristem is a type of plant tissue that contains undifferentiated cells. These cells are capable…
Q: If a plant’s stomata are made to stay open at all times, orclosed at all times, it will die. Why?
A: Stomata are the tiny holes which are present on the surface of the leaves. The function of the…
Q: Stomata can open and close in order to modulate the transpiration stream and allow for exchange of…
A: Every stoma is encircled by two guard cells. The kidney-structured guard cells contain chloroplasts.…
Q: The following statements are correct except* a. Assimilates are transported from areas of supply to…
A: Food, primarily sucrose ( assimilate) is transported by the vascular tissue of phloem from a source…
Stomata are usually open
a. at night, when the plant requires a supply of oxygen.
b. during the day, when the plant requires a supply of carbon
dioxide.
c. day or night if there is excess water in the soil.
d. during the day, when transpiration occurs.
e. Both b and d are correct.
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
- The formation of an air bubble in the xylem is called a. agitation. b. cohesion. c. adhesion. d. cavitation.When absorption of water by the roots fails to keep up with the rate of transpiration, gain in turgor occurs, and the stomata close. A. Agree, because the transpiration occurs faster than root absorption. D. Disagree, because the condition should be when root absorption is able to keep up with transpiration, then stomates close. B. Disagree, because under this condition, the turgor pressure decreases and the stomates close. C. Agree, because increase in turgor pressure under this condition, closes the stomates.Stomata can open and close in order to modulate the transpiration stream and allow for exchange of oxygen and CO2. Stomata OPEN by…
- Guard cellsa. are found primarily on the upper surface of leaves.b. open their stomata by shrinking.c. lack chloropolasts.d. close in response to abscisic acid.Which of the following statements is/are FALSE for CAM plants? a.The dark reaction uses less ATP and NADPH than other plants. b.Succulents and tropical plants growing under semi-arid condition. c.C4 pathway occurs at night and C3 pathway occurs at daytime. d.Scotoactive stomata are open during daytime but close at nighttime.Which of the following is/are false regarding the phloem? A. It transports starch from the leaves to the stem. B. It transports sucrose from the leaves to the roots. C. It is located lateral to the xylem in tree stems. D. Unlike the xylem, majority of the cells are living. E. A and D F. B and C
- Stomata can open and close in order to modulate the transpiration stream and allow for exchange of oxygen and CO2. Stomata OPEN by… Select one: a. Increasing their water potential (more +) through the uptake of K+ and Cl-. b. Guard cells losing water and becoming less turgid. c. None of the choices are true. d. Allowing for rapid movement of ions into the cell through plasmodesmata linking guard cells to neighboring cells. e. Recognizing environmental cues such as high CO2 within the leaf.Stomatal opening is induced by… Select one: a. high CO2 levels in the leaf. b. abscisic acid produced by mesophyll cells. c. proton pumps activated by green light. d. an increase in the water potential (becomes more positive) of guard cells. e. active transport of H+ ions out of the guard cell.Leaf tissue with sunken stomata will have ___ humidity near the stomata and ___ transpiration. Select one: a. increased, decreased b. decreased, increased c. increased, increased d. decreased, decreased
- Which of the following statements is/are false? A. Water is actively transported from source cells into companion cells. B. The transport of sucrose into the Osieve tube elements increases water potential in the phloem. C. The transport of water from the xylem into the phloem increases the O pressure which forces the sucrose water mixture down towards the sink. D. Transpiration cause the water to O move up to the leaves through the vessel elements. E. A and B F. B and CThe movement of water out of phloem sap and back into xylem vessels is often associated with which of the following events? active transport of water out of the phloem sap into a source а. b. passive diffusion of phloem sap into a source active transport of sugars out of the phloem sap into a sink C. hydrostatic push (pressure) forcing phloem sap into a sink Od.Water movement through the xylem needs less pressure than movement through living cells. A. Agree, because water moves in xylem through diffusion. B. Disagree, because water needs turgor pressure in order to diffuse. D. Disagree, beacuse both need equal pressure for materials to pass through xylem and living cells like sievetubes. C. Agree, because water is non-living while photosynthates are living and must pass through living cells that require pressure.