Arrangement of leaves on a stem branch is: (a) Venation (b) Venation (c) Ptyxis (d) Phyllotaxy

Arrangement of leaves on a stem branch is: (a) Venation (b) Venation (c) Ptyxis (d) Phyllotaxy
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Ans. ((d))
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Compare opposite superposed and opposite decussate phyllotaxy.

Description : Compare opposite superposed and opposite decussate phyllotaxy.  

Last Answer : Ans: Both types have two leaves at every node. In superposed type, the successive pairs of leaflets are arranged one above the other in the same plane. In decussate type one pair of leaves at one node are perpendicular to pair of leaves at the next node. 

The specific characters of C4 plant is: (a) Bulliform cells (b) Kranz anatomy (c) Parallel venation (d) Isobilateral leaf

Description : The specific characters of C4 plant is: (a) Bulliform cells (b) Kranz anatomy (c) Parallel venation (d) Isobilateral leaf

Last Answer : Ans. ((b))

$ The method of arrangements of leaves on a stem is calle Aestivation ! Venation in a monocot named Smilax is of the parallel type.

Description : $ The method of arrangements of leaves on a stem is calle Aestivation ! Venation in a monocot named Smilax is of the parallel type.

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Aerosols having carbon and fluorine compounds are chiefly released by: (a) Refineries (b) Automobiles (c) Industries (d) Jets 3. Coir of commerce is obtained from: (a) Endocarp of coconut (b) Mesocarp of coconut (c) Stem of jute (d) Leaves of coconut

Description : Aerosols having carbon and fluorine compounds are chiefly released by: (a) Refineries (b) Automobiles (c) Industries (d) Jets 3. Coir of commerce is obtained from: (a) Endocarp of coconut (b) Mesocarp of coconut (c) Stem of jute (d) Leaves of coconut

Last Answer : Ans. ((d))

Sphenopteris hoeninghausii is the….. a)stem b)root c)leaves d)ovule

Description : Sphenopteris hoeninghausii is the….. a)stem b)root c)leaves d)ovule

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Cycas has two cotyledons but not included in angiosperms because of (a) naked ovules (b) seems like monocot (c) circinate ptyxis (d) compound leaves.

Description : Cycas has two cotyledons but not included in angiosperms because of (a) naked ovules (b) seems like monocot (c) circinate ptyxis (d) compound leaves.

Last Answer : (a) naked ovules

scattered vascular bundles embedded in the ground tissue with no definite arrangement is found in

Description : scattered vascular bundles embedded in the ground tissue with no definite arrangement is found in

Last Answer : scattered vascular bundles embedded in the ground tissue with no definite arrangement is found in – Stem of monocots

Describe various types of symmetry of flower based on the arrangement of floral parts.

Description : Describe various types of symmetry of flower based on the arrangement of floral parts.

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Description : Stem tailed drill seen in which plant ?

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What are the totiptent stem cells of plants ?

Description : What are the totiptent stem cells of plants ?

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Stomata in bryophytes are present in the of: (a) Capsule (b) Leaf (c) Stem (d) Seta

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Last Answer : Ans. ((a))

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Last Answer : Ans. ((c))

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

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Last Answer : c) seed is naked

The resin duct in Pinus stem represents a................ a)large vacuole b)intercellular space c)lysigenous cavity d)schizogenous cavity.

Description : The resin duct in Pinus stem represents a................ a)large vacuole b)intercellular space c)lysigenous cavity d)schizogenous cavity.

Last Answer : d)schizogenous cavity.

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Which aerial stem modification is concerned with vegetative propagation? Give two examples.

Description : Which aerial stem modification is concerned with vegetative propagation? Give two examples. 

Last Answer : Ans: Bulbils. Ex: Agave americana, Dioscoria bulbifera 

Which underground stem modification does not possess roots? Mention its scientific name.

Description : Which underground stem modification does not possess roots? Mention its scientific name. 

Last Answer : Ans: Stem tuber is the underground stem modification that does not possess roots. Solanum tuberosum is its scientific name.  

Banana is propagated by a) Stem cutting b) Tillers c) Suckers d) Crown

Description : Banana is propagated by a) Stem cutting b) Tillers c) Suckers d) Crown

Last Answer : c) Suckers

A common example of stem tuber is a) Ginger b) Garlic c) Onion d) Potato

Description : A common example of stem tuber is a) Ginger b) Garlic c) Onion d) Potato

Last Answer : d) Potato

Onion and garlic are examples of a)Rhizome b) corm c) stem tuber d) bulb

Description : Onion and garlic are examples of a)Rhizome b) corm c) stem tuber d) bulb

Last Answer :  d) bulb

Tissue culture is a good technique to a) Cross two varieties b) Rapidly increase the size of a trees by strengthening the stem c) Eliminate virus d) Improve yield of crops

Description : Tissue culture is a good technique to a) Cross two varieties b) Rapidly increase the size of a trees by strengthening the stem c) Eliminate virus d) Improve yield of crops 

Last Answer : c) Eliminate virus 

The study of past geological plant life is done in branch called as ….. a)Botany b)Paleobotany c)History d)Anthropology

Description : The study of past geological plant life is done in branch called as ….. a)Botany b)Paleobotany c)History d)Anthropology

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A low branch with a node is bent down and covered with soil in a) Marcotting b) Layering c)Cutting d) Budding

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What is Ptyxis is

Description : What is Ptyxis is

Last Answer : Ptyxis is A. Arrangement of leaves on the stem B. Arrangenment of leaves in the bud C. Folding of lamina in bud D. Both B and C

$ Circinate ptyxis is found in Angiosperms. ! The male reproductive organs of Angiosperms are called antheridia.

Description : $ Circinate ptyxis is found in Angiosperms. ! The male reproductive organs of Angiosperms are called antheridia.

Last Answer : $ Circinate ptyxis is found in Angiosperms. ! The male reproductive organs of Angiosperms are called antheridia. A ... D. If both As and R are wrong.

Define Phyllotaxy? -Biology

Description : Define Phyllotaxy? -Biology

Last Answer : answer:

Define types of phyllotaxy. -Biology

Description : Define types of phyllotaxy. -Biology

Last Answer : answer:

Define types of phyllotaxy. -Biology

Description : Define types of phyllotaxy. -Biology

Last Answer : answer:

How many plants among China rose, Ocimum, sunflower, mustard, Alstonia, guava, Calotropis and Nerium (oleander) have opposite phyllotaxy? (a) Three (b) Four (c) Five (d) Two

Description : How many plants among China rose, Ocimum, sunflower, mustard, Alstonia, guava, Calotropis and Nerium (oleander) have opposite phyllotaxy? (a) Three (b) Four (c) Five (d) Two

Last Answer : (a) Three

What is parallel venation in leaves? -Biology

Description : What is parallel venation in leaves? -Biology

Last Answer : answer:

Examples of parallel venation leaves. -Biology

Description : Examples of parallel venation leaves. -Biology

Last Answer : answer:

Whorled, simple leaves with reticulate venation are present in (a) Calotropis (b) neem (c) China rose (d) Alstonia

Description : Whorled, simple leaves with reticulate venation are present in (a) Calotropis (b) neem (c) China rose (d) Alstonia

Last Answer : (d) Alstonia.

You find a herbaceous flowering plant growing in your school garden having leaves with parallel venation. Choose the correct additional features the given plant would be possessing. (I) It has no secondary vascular tissues. (II) Its flower possesses three sepals. (Ill) It possesses tap root. (IV) Its embryo has 2 cotyledons. (1) (I) and (II) (2) (I) and (III) (3) (II) and (IV) (4) (III) and (IV)

Description : You find a herbaceous flowering plant growing in your school garden having leaves with parallel venation. Choose the correct additional features the given plant would be possessing. (I) It has no secondary vascular tissues. (II) Its flower ... (2) (I) and (III) (3) (II) and (IV) (4) (III) and (IV)

Last Answer : 1) (I) and (II)

Why is 'endarch' supposed to be the arrangement of stem and not roots ? -Biology

Description : Why is 'endarch' supposed to be the arrangement of stem and not roots ? -Biology

Last Answer : answer:

Canary date differs from cultivated date in a. Length of fronds b. Arrangement of pinnus c. Thickness of stem d. Area of origin

Description : Canary date differs from cultivated date in a. Length of fronds b. Arrangement of pinnus c. Thickness of stem d. Area of origin

Last Answer : Thickness of stem

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 (iii)Secondary phloem (iv) Phellem The correct order is (a) (iv), (i), (iii), (ii) (b) (iv), (iii), (i), (ii) (c) (iii), (iv), (ii), (i) (d) (i), (ii), (iv), (iii).

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)

Which of the following hormones is produced in leaves ?

Description : Which of the following hormones is produced in leaves ?

Last Answer : Florigen is the hormone produced in the leaves.

Which hormone is found in fruits, flowers, seeds, leaves and roots ?

Description : Which hormone is found in fruits, flowers, seeds, leaves and roots ?

Last Answer : Ethylene hormone is found in fruits, flowers, seeds, leaves and roots.

Why are the leaves cut off while planting banana seedlings ?

Description : Why are the leaves cut off while planting banana seedlings ?

Last Answer : Why the leaves are cut off while planting banana seedlings to prevent perspiration.

Thick cuticle, sunken stomates are found in leaves of: (a) Hydrophytes (c) Mesophytes (b) Xerophytes (d) Epiphytes

Description : Thick cuticle, sunken stomates are found in leaves of: (a) Hydrophytes (c) Mesophytes (b) Xerophytes (d) Epiphytes

Last Answer : Ans. ((b))

Which one does not occur is Seleaginella? (a) Heterospory (b) Hetorophylly (c) Homospory (d) Ligulate Leaves

Description : Which one does not occur is Seleaginella? (a) Heterospory (b) Hetorophylly (c) Homospory (d) Ligulate Leaves

Last Answer : Ans. ((c))

Movement of leaves of sensitive plant, Mimosa pudica are due to: (a) Thernonasty (b) Seisnonasty (c) Hydrothpism (d) Chemo nasty

Description : Movement of leaves of sensitive plant, Mimosa pudica are due to: (a) Thernonasty (b) Seisnonasty (c) Hydrothpism (d) Chemo nasty

Last Answer : Ans. ((b))

What tissue present in leaves of Pinus conducts food and water laterally? (a) Transfusion tissue (b) Phloem (c) Xylem (d) Medullary rays

Description : What tissue present in leaves of Pinus conducts food and water laterally? (a) Transfusion tissue (b) Phloem (c) Xylem (d) Medullary rays

Last Answer : Ans. ((a))

what are leaves?

Description : what are leaves?

Last Answer : Functions of leaves ■ Photosynthesis: The leaves of almost all plants photosynthesize. Sunlight is used to convert carbon dioxide and water to sugars and oxygen. ■ Conduit: Just like stems/roots, there ... point to serve as protection: spines. Many arid-adapted plants, such as cacti, have spines.

The fused bracts in the male flowers of Gnetum are comparable to ....... a) leaves of angiosperms b) bracteoles of angiosperms c) bracts of angiosperms d) perianth of angiosperms

Description : The fused bracts in the male flowers of Gnetum are comparable to ....... a) leaves of angiosperms b) bracteoles of angiosperms c) bracts of angiosperms d) perianth of angiosperms

Last Answer : b) bracteoles of angiosperms

Write short notes on leaves that help in vegetative reproduction

Description : Write short notes on leaves that help in vegetative reproduction

Last Answer : Ans: Leaves which have epiphyllous buds help in vegetative reproduction. Such leaves are called as reproductive leaves. In Bryophyllum, notches of leaf margins have epiphyllous buds which upon shedding strike ... buds arise at the leaf tip and in Begonia from the wounded regions of leaf.  

Compare paripinnate and imparipinnate compound leaves.

Description : Compare paripinnate and imparipinnate compound leaves. 

Last Answer : Ans: Parpinnate compound leaves have leaflets in pairs (Even number of leaflets) and imparipinnate compound leaf has atleast one unpaired leaflet (odd number of leaflets) at the apex of rachis.

Air pollution effects are usually found on a) Flowers b) Leaves c) Stems d) Roots.

Description : Air pollution effects are usually found on a) Flowers b) Leaves c) Stems d) Roots.

Last Answer : b) Leaves

Example of plant in which vegetative propagation is occurred by leaves is called a) Cannabisn b) Chrysanthemum c) Cryophyllum d) Brassica

Description : Example of plant in which vegetative propagation is occurred by leaves is called a) Cannabisn b) Chrysanthemum c) Cryophyllum d) Brassica

Last Answer : c) Cryophyllum

In cutting method of vegetative propagation, cuttings are mainly taken from a) Leaves of parent plant b) Roots or stems of parent plant c) Shoots of parent plant d) Buds of parent plant

Description : In cutting method of vegetative propagation, cuttings are mainly taken from a) Leaves of parent plant b) Roots or stems of parent plant c) Shoots of parent plant d) Buds of parent plant

Last Answer : b) Roots or stems of parent plant