The pressure-flow model of phloem transport states thata. phloem content always flows from the leaves to the root.b. phloem content always flows from the root to the leaves.c. water flow takes sucrose from a source to a sink.d. water pressure creates a flow of water toward the source.e. Both c and d are correct.

Q: Thigmotropism is a plant response toa. light. b. cold.c. touch. d. gravity. e. drought.

A: Answer is c.) touch.

Q: tomatal opening is induced by… Select one: a. high CO2 levels in the leaf. b. abscisic acid…

A: The stomatal opening is induced by the striking of blue light on the stomatal pore. The photons…

Q: The opening in the leaf that allows gas and water exchange iscalled thea. lenticel.b. hole.c.…

A: Transpiration is evaporation of excess water from plants through its aerial parts like stem, leaves,…

Q: Between the bark and the wood in a woody stem, there is a layer ofmeristem calleda. cork cambium.b.…

A: Plants have various kinds of specialized tissue that perform specific functions. All these tissues…

Q: The root cap needs to be continually supplied with new cells by the root apical meristem (RAM)…

A: Chemical coordination refers to the use of chemicals as a signal to stimulate a particular type of…

Q: A monocot stem differs from a eudicot stem in that, in the monocot stem,a. xylem and phloem are in a…

A: A plant seeds that contains only one cotyledon or embryonic leaf is called as monocot. While the…

Q: A region of active cell division where primary growth occurs is the a. internode.b. apical…

A: Plant anatomy deals with the study of internal structure of various organs of plants. Anatomical…

Q: Root hairs form in the zone of a. cell division. b. elongation. c. maturation. d. More than…

A: Plants are multicellular and eukaryotic organisms. Plant body is made of shoot and root. Shoots are…

Q: In a root tip, the elongation zone has the function of: O a. Pushing the root down into the soil. O…

A: Roots are nongreen, underground and cylindrical structure of a plant that form a descending axis for…

Q: Root pressure moves water up the stem: a. Pumps are found along the length of the xylem vessels. O…

A: Plant growth is often hampered by a lack of water. As a result, plants have evolved an efficient…

Q: Root cells exhibit positive gravitropism with the help ofa. auxin in the root cells.b. amyloplasts…

A: When the effect of gravity influences the direction of growth of a plant, it is called gravitropism.…

Q: According to the pressure-flow model, sugar is actively transported into phloem anda. enters xylem,…

A: Answer is d.)  water follows by osmosis, providing pressure that moves the water and sugar through…

Q: When a dicot seed sprouts,a. a coleoptile protects the emerging shoot.b. the shoot develops more…

A: Answer: Introduction: Angiosperm are the largest group of vascular green plants, containing 300,000…

Q: Explain the movement of organic nutrients in a plant according to the pressure-flow model of phloem…

A: Transportation is an indispensable interaction in plants. Trees transport all the supplements and…

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: The Casparian strip affectsa. how water and minerals move into the vascular cylinder.b. vascular…

A: In roots and in some herbaceous stems but not usually in woody stems, the innermost layer of…

Q: Which of the following plant structures is necessary for transpiration to occur? a. Sieve tubes c.…

A: Transpiration is an important process in which water moves through the plant parts and is evaporated…

Q: Which of the following is NOT an adaptation to a high saline environment? a. Secretion of salts…

A: The environments with more salinity or more salt concentration than the normal levels are called…

Q: which of the following concernig roost is incorrect? a. monocot roots exhibit primary grwoth and…

A: Introduction The root system is the plant axis's descending (developing downwards) part. When a seed…

Q: Leaf tissue with sunken stomata will have ___ humidity near the stomata and ___ transpiration.…

A: Stomata  It refers to the pore located in the epidermis of leaves, stems, and other organs, that is…

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: These are pores in plant cell membranes that allow for a shared cytoplasm between cells Select one:…

A: Cell membrane or plasma membrane is present in both eukaryotic and prokaryotic cells. Plasma…

Q: Minerals dissolved in watera. enter root epidermal cells by active transport.b. take an…

A: Answer is b.) take an extracellular pathway through roots to thevascular cylinders.

Q: The ability of a sunflower plant to become taller is directly due to itsa. apical meristem. c.…

A: Meristem :   Plant tissues responsible for growth of the plant. The cells divided and differentiated…

Q: When comparing vessel elements with sieve tube elements, only vessel elements.   Select one: a.…

A: Vascular bundle of plants :- It is a part of the transport system in vascular plants. The transport…

Q: Water movement through cell walls is a. apoplastic. b. symplastic. c. Both a and b are…

A: A cell wall is defined as the non-living component, covering the outmost layer of a cell. Its…

Q: Stomata are usually opena. at night, when the plant requires a supply of oxygen.b. during the day,…

A: Option(a) is incorrect because plants depend on the availability of carbon dioxide and not oxygen.

Q: What process creates the pressure that drives phloem toward sinks?a. Osmosis into the sieve tubes at…

A: Plants play important role in producing oxygen on the earth. Plants go through the process known as…

Q: Sugar transport from leaves to roots occurs by_______ . a. a pressure gradient inside sieve tubes b.…

A: The vascular system in a plant is made up of conducting tubes like xylem and phloem. The prepared…

Q: he movement of water out of phloem sap and back into xylem vessels is often associated with which of…

A: C. Active transport of sugar out of phloem sap into the sink.

Q: 1. The distribution of water through the symplast occurs in the cell walls and xylem elements.  C.…

A: When root hairs absorb the water from the soil it can  reach to the deeper  root layers by the two…

Q: Cytokinins, which control root and shoot meristem activities, apical dominance, leaf senescence,…

A: Cytokinins are plant growth hormones which perform cell division in plant roots and shoot system.

Q: The ______ is impermeable to passive water transport, and regulates what enters the xylem. Select…

A: The correct answer is option e. Casparian strip

Q: [PLANT PHYSIOLOGY] When comparing vessel elements with sieve tube elements, only vessel elements.…

A: Complex permanent tissue are composed of two or more type of simple tissue and heterogeneous in…

Q: Unlike the movement of water in the xylem, phloem sap movement is not defined by gravity. It can…

A: During photosynthesis, plants synthesize glucose. This gets transported across the cells in the…

Q: Stomata are made of specialized cells called _____ which surrounds a tiny pore/opening. A. Stoma B.…

A: Introduction In a vascular plant, a vascular bundle is a strand of conductive tissue that transfers…

Q: Sugars pass from cell to cell in the leaf starting in the _______ of the mesophyll; they move…

A: Plant physiology is a field of botany deals with the study of the physiology of plants. Plant…

Q: The electrochemical gradient is __________________. A. The total chemical potential gradient B. The…

A: Xylem is the specialised tissue of vascular plants that transports water and nutrients from the…

Q: This is the location of the carbon fixation reactions in C4 plants.      Select one: a.  the…

A: INTRODUCTION C4 plants These are the plants who avoid photorespiration by using phosphoenolpyruvate…

Q: What is wood? a. Primary xylem that has accumulated inside a cylinder of vascular cambium b.…

A: Option C is the correct answer i.e. Secondary xylem that has accumulated inside a cylinder of the…

Q: Mass flow occurs when; a. Soil temperatures change, thereby changing molecular motion. b.…

A: Water moves from roots to aerial parts of the plant by Mass flow.

Q: Identify the response of pollen tube movement towards ovule. A. autotropism B. phototropism C.…

A: As per our guidelines we are supposed to answer only ? One question ( if there are multiple…

Q: Arrange the following four events in an order that explains the mass flow of materials in the…

A: Transportation in plants refers to the movement of water, minerals, and other substances from the…

Q: [PLANT PHYSIOLOGY] Stomatal opening is induced by. Select one: O a. high CO2 levels in the leaf. Ob.…

A: Stomata open in response to light such as blue and red light. Red light usually induces stomatal…

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…

Osmosis

In simple words, osmosis is the slow, gradual movement of a liquid through a membrane. But there are nuances to this process. For instance, there has to be an imbalance in the distribution of solute in the liquid on either side of the membrane, which has to be semipermeable. The liquid in the region with a lower solute concentration moves to the region with a higher concentration, thereby displacing the solution in the process. The objective is to equalize the concentration of molecules on both sides of the membrane; the displacement of liquid can be viewed as a byproduct of this equalization. Since there is no energy required to carry osmosis, it is considered a passive process.