Description : Pericycle of roots produces (a) mechanical support (b) lateral roots (c) vascular bundles (d) adventitious buds.
Last Answer : b) lateral roots
Description : Cork cambium and vascular cambium are (a) parts of secondary xylem and phloem (b) parts of pericycle (c) lateral meristem (d) apical meristem.
Last Answer : (c) lateral meristem
Last Answer : c) lateral meristem
Description : Read the following four statements (A - D). (A) Both photophosphorylation and oxidative phosphorylation involve uphill transport of protons across the membrane. (B) In dicot stems, a new cambium ... Petunia are polyandrous. (D) Symbiotic nitrogen fixers occur in free-living state also in soil.
Last Answer : (A) Both photophosphorylation and oxidative phosphorylation involve uphill transport of protons across the membrane.
Description : The roots that originate from the base of the stem are (a) fibrous roots (b) primary roots (c) prop roots (d) lateral roots.
Last Answer : (a) fibrous roots
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 : Adventitious roots develop from (a) Epidermis (b) Pericycle or interfascicular parenchyma (c) Cortex (d) Endodermis
Last Answer : Ans:(b)
Description : Some vascular bundles are described as open because these (a) are surrounded by pericycle but no endodermis (b) are capable of producing secondary xylem and phloem (c) possess conjunctive tissue between xylem and phloem (d) are not surrounded by pericycle.
Last Answer : (b) are capable of producing secondary xylem and phloem
Description : Assertion : Lateral line system is found in fishes and aquatic larval amphibians. Reason : Lateral line system has receptor of sensory cells derived f
Last Answer : Assertion : Lateral line system is found in fishes and aquatic larval amphibians. Reason : Lateral line ... D. If both Assertion and Reason are false.
Description : In which part of the Plant does photosynthesis take place? A. Flowers B. Roots C. Stem D. Leaves (Answer)
Last Answer : D. Leaves (Answer)
Description : Which of the following meristems is responsible for extrastelar secondary growth in dicotyledonous stem? (a) Interfascicular cambium (b) Intercalary meristem (c) Phellogen (d) Intrafascicular cambium
Last Answer : (d) Intrafascicular cambium
Description : In spite of several angiospermic features Gnetum is a gymnosperm because…. a) polyembryony is a common features b) prothallial cell is present in the male gametophyte c) seed is naked d) stem exhibit anomalous secondary growth
Last Answer : c) seed is naked
Description : Why are the vascular bundles of dicots called open bundles? -Biology
Last Answer : answer:
Description : In dicots the pollen-grains possess : (1) two germ pores (2) three germ pores (3) four germ pores (4) one germ pore
Last Answer : (2) three germ pores Explanation: Pollen grains of monocots have one opening, while pollen grains of dicots have three openings. Pollengrains can be monocolpate (having one germ pore called germinal furrow e.g., monocots), bicolpate (2 germ pores) and tricolpate (3 germ pores e.g., dicots).
Description : Dicots could be identified on the basis of: a. Reticulate leaf venations b. Parallel venations c. No leaf venations d. None of these
Last Answer : Reticulate leaf venations
Description : How would you distinguish Monocots from Dicots?
Last Answer : MONOCOTS DICOTS 1. Fibrous root system. 2. Seeds with a single cotyledon. 3. Parallel Venation 4. Vascular bundles are scattered irregularly. 5. Cambium absent. 1. Tap root ... cotyledons 3. Reticulate Venation. 4. Vascular bundles are arranged in a ring. 5. Cambium present
Last Answer : three germ pores
Description : Plant tranquillisers (A) Hold back stem growth and halt plants at a desired height (B) Cause early maturation of plants (C) Accelerate ripening of food and grain (D) Produce seedless fruit
Last Answer : (A) Hold back stem growth and halt plants at a desired height
Description : Mycorrhiza is associated with what part of plants? (A) Roots (B) Leaf (C) Stem (D) Fruits
Last Answer : (A) Roots
Description : Which part of the plant of Cinchona officinalis is used for its preparation Options: 1) Bark 2) Stem with leaves 3) Roots 4) Whole plant
Last Answer : Correct Answer: 1) Bark
Description : Assertion :- The aquatic mammals like Dolphins whales etc. do not contain gill slits. Reason : Their adaptation to aquatic life secondary.
Last Answer : Assertion :- The aquatic mammals like Dolphins whales etc. do not contain gill slits. Reason : Their ... . D. If both Assertion & Reason are false.
Description : Assertion : Secondary air pollutants are formed by interactin among primary pollutants and are more toxic Reason: DDT is secondary air pollutants
Last Answer : Assertion : Secondary air pollutants are formed by interactin among primary pollutants and are more toxic ... but reason is wrong D. Both are wrong
Description : Assertion: Net primary productivity is gross primary productivity minus respiration. Reason :Secondary productivity is produced by hetrotrophs.
Last Answer : Assertion: Net primary productivity is gross primary productivity minus respiration. Reason :Secondary ... If both assertion and reason are false.
Description : Assertion: Secondary succession taked place i recently. Reason : It is caused due to baing of an area.
Last Answer : Assertion: Secondary succession taked place i recently. Reason : It is caused due to baing of an area ... . D. If both assertion and reason are false.
Description : Assertion : When sperm enters in egg , one polar body is released in human . Reason : At the time of ovulation eggs found in secondary Oocyte phase .
Last Answer : Assertion : When sperm enters in egg , one polar body is released in human . Reason : At the time ... False . D. If both Assertion & Reason are False.
Description : Removal of apical bud results in (a) formation of new apical bud (b) elongation of main stem (c) death of plant (d) formation of lateral branching.
Last Answer : d) formation of lateral branching.
Description : Assertion `:-` Nearly 99 percent of the filtrate has to be reabsorbed by the renal tubules. Reason `:-` Glucose is reabsorbed by active mechanism is P
Last Answer : Assertion `:-` Nearly 99 percent of the filtrate has to be reabsorbed by the renal tubules. Reason ` ... . D. If both Assertion & Reason are false.
Description : Assertion `:-` Porthrombinase enzymes converts prothrombin into active thrombin. Reason`:` Thrmoboplastin react with plasma protein in the presece of
Last Answer : Assertion `:-` Porthrombinase enzymes converts prothrombin into active thrombin. Reason`:` Thrmoboplastin ... If both Assertion & Reason are false.
Description : Assertion : Small cells are metabolically less active Reason : K.I. of small cells is less.
Last Answer : Assertion : Small cells are metabolically less active Reason : K.I. of small cells is less. A. If ... False. D. If both Assertion & Reason are false.
Description : Assertion: Old age is not an illness. It is a normal It is a continuation of life with decreasing capacity for adaptation. Reason: Cessation of mitosi
Last Answer : Assertion: Old age is not an illness. It is a normal It is a continuation of life with decreasing ... D. If both the assertion and resson are false.
Description : What is main root of plants called as? (1) Tap root (2) Lateral roots (3) Fibrous roots (4) Anchor
Last Answer : (A) Tap root Explanation: A taproot is a large, central, and dominant root from which other roots sprout laterally.
Description : Smaller roots coming out of main root is called as ______. (1) Tap root (2) Lateral root (3) Fibrous root (4) Ring root
Last Answer : (2) Lateral root Explanation: Lateral roots extend horizontally from the primary root (radicle) and serve to anchor the plant securely into the soil.
Description : A child has less than the normal number of teeth, the mandibular lateral incisor is larger than usual, on x rays it shows with two roots and two roots canals; your diagnosis is:** A. Dilaceration B. Gemination C. Fusion D. Concrescence E. Taurodontism
Last Answer : C. Fusion
Description : The tissue which is involved in development of lateral roots is
Last Answer : The tissue which is involved in development of lateral roots is – Pericycle
Description : Development of lateral roots is
Last Answer : Development of lateral roots is – Endogenous
Description : How does the supply of nitrogen in grains take place? (a) From old leaves (b) From plant roots (c) From stem (d) By photosynthesis
Last Answer : (a) From old leaves
Description : Assertion `:-` Human kidneys can produce urine nearly four times concentrated than the initial filtrate formed. Reason `:-` Counter current mechanism
Last Answer : Assertion `:-` Human kidneys can produce urine nearly four times concentrated than the initial filtrate ... D. If both Assertion & Reason are false.
Description : Assertion (A): Many visitors to the hills suffer from skin and respiratory allergy problems. Reason (R): Conifer trees produce a large quantity of win
Last Answer : Assertion (A): Many visitors to the hills suffer from skin and respiratory allergy problems. Reason ( ... . If both the assertion and reason are false
Description : Assertion (A): There are several goods and services that society needs however private sector doesn t produce all of them. Reason (R): Private sector is profit driven. (a) Both A & R are true and R is the correct ... correct explanation of A. (c) A is true but R is false. (d) Both A & R are false.
Last Answer : (a) Both A & R are true and R is the correct explanation of A
Description : Assertion: Epstein - Barr virus is an oncovirus. Reason: It stimulates the growth of cancer.
Last Answer : Assertion: Epstein - Barr virus is an oncovirus. Reason: It stimulates the growth of cancer. A. If ... D. If both the assertion and reason are false
Description : Assertion: Presence of large amounts of nutrients in water body causes excessive growth of planktonic algae. Reason : It is due to biomagnifications
Last Answer : Assertion: Presence of large amounts of nutrients in water body causes excessive growth of planktonic algae. ... but reason is wrong D. Both are wrong
Description : Assertion: Algal blooms occure in nutrient poor water. Reason: Algal blooms make water unfit for human consumption but cause enormous growth of fish.
Last Answer : Assertion: Algal blooms occure in nutrient poor water. Reason: Algal blooms make water unfit for human ... true but reason is wrong D. both are wrong
Description : Assertion : Ginger has a prostrate-growing rhizome Reason : Shoot growth is not effected by gravity.
Last Answer : Assertion : Ginger has a prostrate-growing rhizome Reason : Shoot growth is not effected by gravity. ... If both the assertion and reason are false.
Description : Assertion: Sewage discharge in a water body causes eutrophication. Reason: This increases the organic content in water body and, hence, the growth of
Last Answer : Assertion: Sewage discharge in a water body causes eutrophication. Reason: This increases the organic content ... Reason are false, then mark (4).
Description : Assertion :- Cell growth results into division Reason :- Cell growth leads to change in nucleocytoplasmic ratio.
Last Answer : Assertion :- Cell growth results into division Reason :- Cell growth leads to change in nucleocytoplasmic ... D. If both Assertion & Reason are false.
Description : Assertion: Under unlimited resource conditions, popultion can show an exponential growth curve. Reason: The maximum possible number of individuals can
Last Answer : Assertion: Under unlimited resource conditions, popultion can show an exponential growth curve. Reason: The ... Reason are false, then mark (4).
Description : Assertion (A). Industrial policy 1991 initiated liberalisation of Indian economy. Reason (R). Industrial growth was very slow before 1991. A. Both (A) and (R) are true and (R) is the correct explanation of (A). B. Both (A) ... A). C. (A) is true but (R) is false. D. (A) is false but (R) is true.
Last Answer : A. Both (A) and (R) are true and (R) is the correct explanation of (A). B. Both
Description : Assertion (A): People population control measures do not necessarily help in checking environmental degradation. Reason (R): The relationship between population growth and environmental degradation is rather complex. Choose the correct ... (R) is false. (D) (A) is false but (R) is true.
Last Answer : Answer: A
Description : difference between lateral and secondary meristem?? -Biology