• Like animals, plants also respire all the time because their cells need energy, to stay alive, but plants can only photosynthesize when they are in the light. Photosynthesis happens in the chloroplasts of plant cells. 
• It produces glucose for use by the plant, and oxygen as a waste product. Respiration uses oxygen and produces carbon dioxide and water as a waste product.
  

Oxygen is a waste product of photosynthesis. While carbon dioxide is exhaled by the plants at night in absence of photosynthesis. Excess water is given out by transpiration.
So the answer is- all of these.

Plants eliminate some waste through diffusion. During the day, excess oxygen gas produced by photosynthesis is released through the stomata. Carbon dioxide produced by respiration is normally used up during photosynthesis. At night, however, as photosynthesis slows, carbon dioxide is not used up as fast as it is produced, and it is released as a waste product. Plants also release waste water by transpiration and guttation. 

Plants eliminate some waste through diffusion. During the day, excess oxygen gas produced by photosynthesis is released through the stomata. Stomata are microscopic pores in leaves. Carbon dioxide produced by respiration is normally used up during photosynthesis. At night, however, as photosynthesis slows, carbon dioxide is not used up as fast as it is produced, and it is released as a waste product. Plants also produce oxygen as a by-product of photosynthesis. The oxygen that is not used for respiration is also excreted through the stomata. Plants do not excrete gases through flowers, roots and seeds. 

In soil rich in moisture content water floods a plant root system. Leaves can retain only a finite amount of water. Excess water i.e xylem sap from the roots is given out through pores or edge of leaves in the form of droplets. This process is called guttation. As this water contains different organic and inorganic substances from the plant it is considered impure. Also, guttation is of universal occurrence. Thus the correct answer is option C.

Guttation is the phenomenon of the release of small water droplets from the pores of the plants. It is done in order to release the extra water out of the plant in very humid conditions. It is commonly seen in mesophytes.

Hydathodes release water in the form of small water droplets and hence are responsible for guttation.

Guttation is not to be confused with dew, which condenses from the atmosphere onto the plant surface. At night, transpiration usually does not occur because most plants have their stomata (pores found in the epidermis of leaves, stems and other organs that are used to control gas exchange)closed. So the correct option is ' Mirabilis’.

Guttation is the loss of water in liquid form through hydathodes. Guttation is usually seen under environmental conditions when transpiration is low and soil is well watered. It occurs under the influence of positive root pressure. Water droplets present on leaf margins of some plants in the early morning is not due drops but the water that has oozed out from xylem tracheids. 

Guttation is the loss of water in liquid form through hydathodes. Guttation is usually seen under environmental conditions when transpiration is low and soil is well watered. It occurs under the influence of positive root pressure. Water droplets present on leaf margins of some plants in the early morning is not due drops but the water that has oozed out from xylem tracheids. Xylem tracheids contain dissolved minerals in the water. Hence water lost in guttation is not pure water but a solution of minerals and will not be tasteless as the pure water of dew drops.

Loss of water in vapour form through stomata is called as transpiration. Loss of water in solution form through vein endings in leaves is called as guttation. Transpiration occurs under the influence of vapour pressure gradient. Guttation is caused due to root pressure when soil is well watered and transpiration is low due to high atmospheric humidity.

Guttation is the loss of water in solution form through hydathodes. It occurs under the influence of root pressure. When transpiration is low and plant absorbs water from well-watered soil under the influence of root pressure. The excess water oozes out as a dilute solution of minerals and other solutes from dead endings of veins. Thus, the correct answer is option B.

Guttation is defined as loss of water in liquid form through water stomata or hydathodes. The water is lost as a dilute solution of mineral salts. Guttation occurs under the influence of positive root pressure.

Guttation is the loss of water in liquid form as a dilute solution from uninjured leaf tips. The uninjured leaf tips have hydathodes or water stomata. Under conditions of low transpiration dilute solution of minerals oozes out through them under the influence of increased root pressure. Thus, mostly guttation is observed during night time when transpiration is low, for example, due to high atmospheric humidity and sufficient water is present in soil. The most important force responsible for guttation is positive root pressure.

Guttation is the loss of water in the form of the dilute solution which consists salts and minerals through stomata or hydathodes. Guttation occurs under the influence of root pressure when soil is well watered but humidity is high consequently transpiration is less.

Loss of water as dilute solution of minerals and salts from hydathodes is called as guttation. It is prominently seen when transpiration is low but root pressure is high. When water evaporates, the mineral salts are left behind as whitish deposits.

The movements showed by plants can be classified broadly as
(1) Hygroscopic- due to loss or gain of water and
(2) Vital- due to irritability of the cytoplasm. 
Nyctinasty or sleep movements are rhythmic movements, also called as sleep movements and are caused by relative changes in cell size on the opposite sides of the leaf base called as pulvinus. 

Guttation is the loss of water through water stomata (hydathodes) in solution form as a dilute solution of mineral salts. This process occurs, when the absorption of water exceeds transpiration i.e., when plants are absorbing water actively. A positive root pressure is built up under the influence of which excess water simply oozes out through the dead ends of xylem tracheids and vessels. Thus, the correct answer is option D.

Guttation is the loss of water through water stomata (hydathodes) in solution form as a dilute solution of mineral salts. When the absorption of water exceeds transpiration i.e., when plants are absorbing actively, a positive root pressure is built up under the influence of which excess water simply oozes out through the dead ends of xylem tracheids and vessels. A loose collection of cells called as epithem, present at the dead ends of xylem tracheids and vessels. The epithem cells do not regulate opening and closing of hydathodes. Thus, hydathodes are unregulated openings and are always open. Thus, the correct answer is option D.

Guttation is the loss of water through water stomata (hydathodes) in solution form as a dilute solution of mineral salts. The term was coined by Burgerstein in 1887. When the absorption of water exceeds transpiration i.e., when plants are absorbing actively, a positive root pressure is built up under the influence of which excess water simply oozes out through the dead ends of xylem tracheids and vessels. Thus, the correct answer is option A.

Guttation is the loss of water in solution form through hydathodes. The water lost in guttation is a dilute solution of mineral salts. The guttation occurs under the influence of positive root pressure and depends on environmental conditions. It is generally observed when atmospheric humidity is high so that rate of transpiration is low and soil is well watered. Thus, the correct answer is option B.

Guttation is the loss of water through water stomata (hydathodes) in the form of the dilute solution of mineral salts. When the absorption of water exceeds transpiration i.e., when plants are absorbing water actively, a positive root pressure is built up under the influence of which excess water simply oozes out through the dead ends of xylem tracheids and vessels. This usually happens during early morning hours when transpiration is low.

The exudation of xylem sap at the edges or tips of the leaves of some vascular plants, like grasses is called guttation. Unlike transpiration, it takes place only in certain conditions like cool and highly humid atmosphere. It is because plants can absorb up a limited amount of water. The excess water is secreted from the roots through the xylem and out through the hydathodes or water glands.

When the plant absorbs water by their own, it is called active absorption. It takes place when transpiration is low and amount of water in the soil is high. In this case root hairs play the major role in the absorption of water. Root pressure is the positive pressure that develops in the roots of plants by the active absorption of nutrients from the soil. It causes sap to rise through a plant stem to the leaves. Guttation is the exudation of xylem sap on the tips or edges of leaves of some vascular plant. According to the passive absorption, root hairs do not play any role in absorption. It takes place only when transpiration rate is high. So, the correct option is D.

The process of exudation of sap on the tips or edges of leaves in plant is called guttation. It takes place only under certain conditions like cold and high relative humidity in the atmosphere. It occurs through the specialized structures called hydathodes. They are generally restricted to the apex or the edges of the margins of leaves. Structurally, hydathodes consist of a simple pore in the epidermal layer found at the tip.

Guttation is the excretion of drops of xylem sap on the tips or edges of leaves of some vascular plants, such as grasses. It is the loss of water in liquid form through hydathodes.

The soil rich in moisture content, water floods a plant root system. Leaves can retain only a finite amount of water. Excess water i.e xylem sap is given out from the roots through pores or edge of leaves and this process is called guttation. Thus the correct answer is option B.

Transpiration is the process in which water vapors are released from the stomata. Guttation is the process of release of water droplets from the hydathodes.

Guttation is the loss of water in liquid form as a dilute solution from uninjured leaf tips. The uninjured leaf tips have hydathodes or water stomata. Under conditions of low transpiration dilute solution of minerals oozes out through them under the influence of increased root pressure.

Root pressure is osmotic pressure within the cells of a root system. Root pressure is generated by active uptake of minerals by roots, which lowers water potential of root cells and water flows inside the cells along its concentration gradient. Thus, on the cutting of shoot, excretion of watery substance from cut side occurs.

All plants do not show guttation. It is restricted to about 345 genera of herbaceous and some woody plants.
e.g., Garden Nasturtium, Oat Balsum, Tomato etc

Transpiration is the process where plants absorb water through the roots and then give off water vapor through pores in their leaves.

Guttation is the loss of water in the form of droplets along the margin and tips through special structures called hydathode. The guttational drops comprise of water various salts dissolved in it. 
Thus, the correct answer is option (B). 

Guttation is the loss of water in the form of liquid from the uninjured margins of the leaves is called guttation. The pores are known as hydathodes. The level of soil moisture is high which creates greater root pressure. This root pressure creates a force which allows exudation of water from the tips. It is favored when the transpiration is suppressed and the relative humidity is high
Thus the correct answer is option (A). 

Water exduation through hydathodes is known as guttation. Guttation is the process of loss of impure water (a dilute solution of different organic and inorganic substances) from plant infact, mostly from margins of leaves. It occurs when transpiration rate is very low as compared to rate of water absorption. Due to this root pressure is developed and water is pushed out through specialized pores at vein endings called hydrathodes. Each hydrathode is made up of group of loosely arranged achlorophyllous or colorless and parenchymatous cells called epithem. These cells help in absorbing a good percentage of inorganic and organic solutes present in the exudate. 

Guttation is the moisture emitted by plants during night time.

Root pressure is the pressure caused due to the accumulation of water in the root region. It is caused in the absence of transpiration so, due to excess water in the plant, it exudes water through leaves in morning time it is called guttation.

Guttation is the process of secretion of the droplet of water from the pores of the plant. It occurs when the root pressure goes high and so the suction force gets increased. Also, when the rate of transpiration, that is the rate of evaporation of water from the leaves goes low, the guttation takes place.

Guttation is the process in which plant pores secrete droplets of water.

As the concentration of solute increases, water potential decreases.

Water lost through guttation is in the form of water droplets which also take minerals along with them. Since it is in liquid form, it can dissolve minerals in too.

Loss of water in the form of water droplets from the pores of plants is called as guttation. Adhesion is the mutual attraction between unlike molecules that results in the sticking together of those molecules to one another. Imbibition is a type of diffusion in which water is absorbed by solid material like dry wood that results in an increase in volume. When a cell is placed in a hypotonic solution, there is more solute concentration in the cell than in the solution. Water moves from lower concentration of solute (solution) to higher concentration of solute (cell). This results in the swelling of cell. 

Transpiration is the process in which water vapours are released from the stomata.

(A) Vein ending - Guttation

Guttation is the process of loss of water from the surface of leaves in the form of water droplets. The margins of leaves contain opening called as hydathodes from where the guttation takes place.

Guttation is the excretion of drops of xylem sap on the tips or edges of leaves of some vascular plants, such as grasses. In the absence of light, plant loose excess water in the form of liquid through hydathodes because most plants have their stomata closed at night. When there is a high soil moisture level, water will enter plant roots, because the water potential of the roots is lower than in the soil solution. The water will accumulate in the plant, creating a slight root pressure. The root pressure forces some water to exude through special leaf tip or edge structures, hydathodes or water glands, forming drops. Therefore, the correct answer is option A.

Guttation is the term used to refer to the phenomenon in which droplets of eater secreted from the pores in leaves of plants. It occurs through specialised pores called hydathodes. It takes place at night and in conditions of high root pressure and low transpiration. It occurs in plants growing under conditions of high soil moisture and high humidity. Thus, the correct answer is 'It occurs through specialised pores called hydathodes.'