tomatal 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.

Q: Weed scientists often say a happy, growing plant will die faster than one that is under stress from…

A: Callisto is a weedicide that is used to control the broad leaved weeds specifically used in corn…

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

A: Answer is c.) touch.

Q: Choose the incorrect statement: a. Bundle sheath cells surround the vascular bundles in both…

A: Complex permanent tissues are composed of two or more types of simple tissues and are heterogeneous…

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: 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: 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: Phytochromea. can be affected by red and far-red wavelengths of light.b. affects a plant’s…

A: The elimination of the adverse effects (improper temperature, sunlight, water availability, and…

Q: The cork cambium: O a. Is a thick protective layer. Ob. Forms a layer around the xylem. Oc…

A: Vascular plants are plants with specialized vascular tissue. There are two kinds of vascular tissue…

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 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: 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: Howare C4 plants and CAM (crassulacean acid metabolism) plants similar?a.They both open their…

A: In desert plants photosynthesis has evolved through various diversifications that conserve water. In…

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: Arrange the following layers in the correct order from the inside to outside

A: The growth in plants is of two types - lengthening of stems and shots - the primary growth and the…

Q: What role do cohesion and adhesion play in xylem transport?a. Like transpiration, they create a…

A: Plants have specialized tissue for the conduction of water, minerals, and food. The tissues involved…

Q: What role do cohesion and adhesion play in xylem transport?a. Like transpiration, they create a…

A: Introduction  Plants need continuous supply of water and nutrients for their survival and growth.…

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: Which of the following is True?a. Chloroplasts are found primarily in leaf mesophyll cells.b. The…

A: Mesophyll cells are a form of ground tissue that can be found in the leaves of plants.…

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: It was observed during the early 20th century that the abscission zone of leaves of tree growing…

A: Solution Weakening of abscission zone was caused by ethylene ( gaseous plant growth regulator).…

Q: The stomata open due to the guard cells: O a. Contracting to leave a gap between the cells, the…

A: Stomata are cell structures in the epidermis of tree leaves, that are engaged with the trading of…

Q: Which of the following statements about gravity perception is FALSE? A. Statoliths are specialized…

A: Gravity perception is an important activity in plants as they need to send their roots downwards…

Q: Which of the following adaptations allowed plants to grow in drier environment but without much…

A: Plants are autotrophic in nature. They synthesize their own food by the process of photosynthesis.

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: 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: 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: 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: When absorption of water by the roots fails to keep up with the rate of transpiration, gain in…

A: Transpiration and photosynthesis generally happen in day time. Water cycle and food cycle continue…

Q: Which of the following may stimulate the growth of the roots in plant cuttings? Select one: a. The…

A: Plant growth is the irreversible increase in volume and size and the main driver for this type of…

Q: You were comparing two plants A and B: plant A has hyphal association in its roots and plant B lacks…

A: There are two plants, plant A and plant B. Plant A has a hyphal association in its roots and plant B…

Q: Stomata and lenticels are both involved in exchange ofCO2 and O2. Why do stomata need to be able to…

A: The stomata are openings in the epidermis of the leaf that allow exchange of gases. These are also…

Q: Heavy metal stress is associated with the following plant responses except: * A. Phytochelatin…

A: Due to the pollution if the soil by various anthropogenic activities, the heavy metals such as Fe,…

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…