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 : Main function of lenticel is (a) transpiration (b) guttation (c) gaseous exchange (d) bleeding
Last Answer : (c) gaseous exchange
Description : Which of the following statements is not true for stomatal apparatus? (a) Guard cells invariably possess chloroplasts and mitochondria. (b) Guard cells are always surrounded by subsidiary cells. (c) Stomata are involved in gaseous exchange. (d) Inner wall of guard cells are thick
Last Answer : (b) Guard cells are always surrounded by subsidiary cells.
Description : Opening and closing of stomata is due to the (a) hormonal change in guard cells (b) change in turgor pressure of guard cells (c) gaseous exchange (d) respiration.
Last Answer : (b) change in turgor pressure of guard cells
Description : A climbing plant with woody stem is called a. Vine b. Liana c. Hedge d. All of the above
Last Answer : Vine
Description : Hard, thorny structures which protect the buds of woody plants during winter, are termed as: a. Nodes b. Scales c. Bracts d. None of all
Last Answer : Scales
Description : Lenticels are involved in (a) food transport (b) photosynthesis (c) transpiration (d) gaseous exchange
Last Answer : (d) gaseous exchange.
Description : What are the supporting tissues of woody dicotyledonous stem?
Last Answer : Supporting tissues of woody dicotyledonous stem are: i) Wood ii) Bark. They are produced from the activity of two types of meristematic tissues called vascular cambium and cork cambium. As a ... iii) Expansion of vascular tissues stretches and breaks the epidermis and cortex, which are lost.
Description : Vine mean climbing/trailing plants with a. Herbaceous stem b. Woody stem c. Both of these d. None of these
Last Answer : Herbaceous stem
Description : Read the different components from (i) to (iv) in the list given below and tell the correct order of the components with reference to their arrangement from outer side to inner side in a woody dicot stem. (i) Secondary cortex (ii) Wood ... ) (c) (iii), (iv), (ii), (i) (d) (i), (ii), (iv), (iii).
Last Answer : (a) (iv), (i), (iii), (ii)
Description : In a woody dicotyledonous tree, which of the following parts will mainly consist of primary tissues? (a) All parts (b) Stem and root (c) Flowers, fruits and leaves (d) Shoot tips and root tips
Last Answer : (d) Shoot tips and root tips
Description : In plants, the external group of tissues, from the cambium outward, of a woody stem or root is known as what?
Last Answer : ANSWER: BARK
Description : Select the correct statement: (1) Lenticel is the exit route for transpiration (2) The action spectra of transpiration is blue and red (3) Transpiration helps the plant to remain cool (4) Transpiration can be measured by photometer
Last Answer : Ans. ((c))
Description : During which stage of pressure ulcer development does the ulcer extend into the underlying structures, including the muscle and possibly the bone? a) Stage IV A stage IV pressure ulcer ... area of nonblanchable erythema, tissue swelling, and congestion, and the patient complains of discomfort.
Last Answer : a) Stage IV A stage IV pressure ulcer extends into the underlying structure, including the muscle and possibly the bone.
Description : State where are the stomata ideally located. Are they cellular structures?
Last Answer : Answer. Stomata are minute pores found on the surface of leaf. Yes they are cellular structures.
Description : The girth of the stem or root increases due to ___ (a) Apical meristem (b) Cambium (c) Intercalary meristem (d) Epidermis
Last Answer : (b) Cambium
Description : Name the outer portion of a stem or root, bounded externally by the epidermis, and internally by the cells of the pericycle.
Last Answer : ANSWER: Cortex
Description : Stomata in bryophytes are present in the of: (a) Capsule (b) Leaf (c) Stem (d) Seta
Last Answer : Ans. ((a))
Description : Where is the lenticel located ?
Last Answer : Located on the lenticel stem.
Description : Where is Lenticel Found in Plants ?
Last Answer : : Lenticell is found in the bark of stems in plants.
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 : Stomata and mesophyll cells gas exchange? -Biology
Last Answer : answer:
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 : The flat like structures formed due to condensation of gaseous clouds after big-bong where called as :
Last Answer : The flat like structures formed due to condensation of gaseous clouds after big-bong where called as : A. Planets B. Sun C. Nebula D. Galaxy
Description : The gaseous exchange in plants take place through?
Last Answer : Stomata
Description : In woody plant cells the secondary cell wall consists of what? -Biology
Description : What is the estimation of age of woody plant by counting annual ring? -General Knowledge
Last Answer : The answer is 'Dendrochronology'
Description : What is the estimation of age of woody plant by counting annual ring?
Last Answer : Dendrochronology
Description : In plant studies, many species of angiosperms lack secondary growth and therefore do not become woody. They are generally called by which of the following? a) trees b) bines c) herbs d) none of the above
Last Answer : ANSWER: C -- HERBS
Description : Estimatin of age of woody plant by counting annual ring is- (a) Dendrology (b) Dendrochronology (c) Agronomy (d) Demography
Last Answer : (b) Dendrochronology
Description : What is the ratio of gaseous exchange in plants? -Biology
Description : In lung, gaseous exchange is done by `:-`
Last Answer : In lung, gaseous exchange is done by `:-` A. Simple diffusion B. Active transport C. Passive transport D. fascilitated diffusion
Description : in which part gaseous exchange take place in rabbit
Last Answer : in which part gaseous exchange take place in rabbit A. Traches `&` alveolar duct B. Trachea `&` ... Alveolar duct `&` alveoli D. Alveoli `&` Trachea
Description : Name the structure/organs in plants that are used for gaseous exchange
Last Answer : Name the structure/organs in plants that are used for gaseous exchange
Description : How lungs fulfill this requirement that large surface area and thin epithelium are required for gaseous exchange?
Last Answer : Feel Free to Answer
Description : Why Gaseous exchange and breathing are necessary for cellular respiration explain?
Description : Why gaseous exchange between organisms and environment is necessary?
Last Answer : The exchange of gases is necessary because: - i) When organism get oxygen from environment to oxidize their compounds. In this process CO2 is produced which is harmful for body. Therefore ... iii) The exchange of gases between organisms and environment form the first stage of aerobic respiration.
Description : Describe different methods of gaseous exchange in plants?
Last Answer : Plants have no special organs for exchange of gases. In plants gaseous exchange occurs in each part. The different methods are as under: - Through Stomata: - Gaseous exchange takes place ... gaseous exchange. Through Diffusion: - The aquatic plants obtain oxygen by diffusion from water.
Description : Death of protoplasm is a pre-requisite for a vital function like (a) transport of sap (b) transport of food (c) absorption of water (d) gaseous exchange.
Last Answer : (a) transport of sap
Description : Death of protoplasm is a pre-requisite for a vital function like (a) transport of sap (b) transport of food (c) absorption of water (d) gaseous exchange
Description : One of the methods of purification of leach liquor is ion exchange, which involves (A) Exchange between two liquid phases (B) Exchange between a gaseous phase and a liquid phase (C) Exchange between a liquid phase and an organic resin phase (D) Exchange between a solid phase and a gas phase
Last Answer : (C) Exchange between a liquid phase and an organic resin phase
Description : Absorption with chemical reaction' is involved in the removal of (A) Carbon dioxide from gaseous stream using alkaline solution (B) Benzol from coke oven gas using solar oil/wash oil (C) Ammonia ... gas using refrigerated water (D) Tar from coke oven gas in primary gas coolers using chilled water
Last Answer : (A) Carbon dioxide from gaseous stream using alkaline solution
Description : Arrange in correct sequence the structures formed during spermatogenesis a) spermatogonia b) Secondary spermatocyte c) Spermatogonial stem cells c) sp
Last Answer : Arrange in correct sequence the structures formed during spermatogenesis a) spermatogonia b) Secondary spermatocyte c) ... -d-e D. c-d-a-b-c
Description : Which one of the following statements is not correct? (a) Offspring produced by the asexual reproduction are called clone. (b) Microscopic, motile, asexual reproductive structures are called zoospores. ( ... in the standing water, drains oxygen from water that leads to the death of fishes.
Last Answer : (c) In potato, banana and ginger, the plantlets arise from the internodes present in the modified stem.
Description : You are given a fairly old piece of dicot stem and a dicot root. Which of the following anatomical structures will you use to distinguish between the two? (a) Secondary xylem (b) Secondary phloem (c) Protoxylem (d) Cortical cells
Last Answer : (c) Protoxylem
Description : Which of the following is not a stem modification? (a) Tendrils of cucumber (b) Flattened structures of Opuntia (c) Pitcher of Nepenthes (d) Thorns of citrus
Last Answer : (c) Pitcher of Nepenthes