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The ciliated epithelial cells are required to move particles or mucus in a specific direction. In human, these cells are mainly present in :

  • Option 1)

    Bile duct and Bronchioles

  • Option 2)

    Fallopian tubes and Pancreatic duct

  • Option 3)

    Eustachian tube and Salivary duct

  • Option 4)

    Bronchioles and Fallopiun tubes

  Ciliated epithelium - Single layer of columnar or cuboidal cells bearing cilia on their surface. - Contains goblet cells (secretory cells) in some locations. - wherein Locations - Upper respiratory tract, uterine (fallopian) tube, uterus, paranasal sinuses, ventricles of brain & spinal central canal (ependyma). Functions - Moves mucous and other substances by ciliary action, movement of...

Select the correct sequence of organs in the alimentary canal of cockroach starting from mouth :

 

  • Option 1)

    Pharynx  \rightarrow Oesophagus \rightarrow Crop \rightarrow Gizzard \rightarrow Ileum \rightarrow Colon \rightarrow Rectum

  • Option 2)

    Pharynx  \rightarrow Oesophagus \rightarrow  Gizzard \rightarrow Crop \rightarrow Ileum \rightarrow Colon \rightarrow Rectum

  • Option 3)

    Pharynx  \rightarrow Oesophagus \rightarrow  Gizzard \rightarrow  Ileum \rightarrow Crop \rightarrow Colon \rightarrow Rectum

  • Option 4)

    Pharynx  \rightarrow Oesophagus \rightarrow  Ileum \rightarrow Crop \rightarrow Gizzard \rightarrow Colon \rightarrow Rectum

 
  Alimentary canal of cockroach - The alimentary canal of cockroach is divided into three parts, foregut, midgut, and hindgut.  - wherein Foregut (stomodeum) is differentiated into five parts. Buccal chamber or mouth cavity, pharynx, oesophagus, crop and gizzard        The alimentary canal of cockroach has the following organs in order...

Persistent nucellus in the seed is known as:

 

  • Option 1)

    Chalaza

  • Option 2)

    Perisperm

  • Option 3)

    Hilum

  • Option 4)

    Tegmen

Nucellus is the central tissue of ovules that contains the embryo sac. In some seeds like black pepper, it presists after the double fertilization. The persistent nucellus is called perisperm. It performs nutritive function.Option 1)ChalazaOption 2)PerispermOption 3)HilumOption 4)Tegmen

Pholem in gymnosperms lacks:

  • Option 1)

    Albuminous cells and sieve cells

  • Option 2)

    Sieve tube only

  • Option 3)

    Companion cells only

  • Option 4)

    Both sieves tubes and companion cells

 
  Elements of Phloem - Sieve element, campanion cells, phloem parenchyma and phloem fibres are four elements of phloem.     The pholem of gymnosperm possess sieve tubes sieve tube elemments which are living and thin - walled. However, it lacks companion cells. This is the major difference between angiosperms and gymnosperms as companion cells are present in angiosperms but absent in...

Which of the statement given below is not true about formation of Annual Rings in tree?

 

  • Option 1)

    Annual rings is a combination of spring wood and autumn wood produced in a year.

     

  • Option 2)

    Differential activity of cambium causes light and dark bands of tissue - early and late wood respectively

  • Option 3)

    Activity of cambium depends upon variation in climate

  • Option 4)

    Annual rings are not prominent in trees of temperate region.

     

  Annual ring - Annual rings are formed due to inequal activity of vascular cambium. In winter or autumn season, the activity of the cambium is less and cuts off small sized xylem elements (vessels) which constitute late wood or autumn wood. The vascular cambium is highly active in spring or summer and secondary xylem is formed. - wherein Cells are large with wide lumen. The wood is known as...
Medical
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The term 'polyadelphous' is related to

  • Option 1)

    gynoecium

  • Option 2)

    androecium

  • Option 3)

    corolla

  • Option 4)

    calyx

 
As learnt in Structure of anther - Each anther consists of two anther lobes and each lobe contains pollen sac. Sterile & undeveloped stamens are called staminodes. - wherein When 4 stamens are present out of them two are long and 2 are short. then it is called didynawous. (lamiaceae) When sex stamens are arranged in two works (4 long & 2 short), called tetradynamous. When the floral parts of...
Medical
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The balloon-shaped structures called tyloses

  • Option 1)

    originate in the lumen of vessels

  • Option 2)

    characterize the sapwood

  • Option 3)

    are extensions of xylem parenchyma cells into vessles

  • Option 4)

    are linked to the ascent of sap through xylem vessels

 
As learnt in Tyloses - Bladder like ingrowth of parenchyma cells into lumen of vessels  - wherein Tylose blocks the conduction of water. In gymnosperms, tylosoids are formed in place of tyloses.            Option 1) originate in the lumen of vessels Incorrect option Option 2) characterize the sapwood Incorrect option Option 3) are extensions of xylem parenchyma cells into vessles correct...
Medical
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Free-central placentation is found in

  • Option 1)

    Dianthus

  • Option 2)

    Argemone

  • Option 3)

    Brassica

  • Option 4)

    Citrus

 

 

As learnt in

Free central placenta -

Ovary is one chambered and the placenta bearing the ovules develops all around the central axis.

- wherein

Ex. Dtanques, Stellaria

 

 


Option 1)

Dianthus

Correct option

Option 2)

Argemone

Incorrect option

Option 3)

Brassica

Incorrect option

Option 4)

Citrus

Incorrect option

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Medical
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Cortex is the region found between

  • Option 1)

    epidermis and stele

  • Option 2)

    pericycle and endodermis

  • Option 3)

    endodermis and pith

  • Option 4)

    endodermis and vascular bundle

 
As learnt in Stele - The Stele is the whole central mass of vascular tissue (vascular cylinder) with or without pith surrounded by endodermis. Steler system is started from pteridophytes. - wherein In order of evolution types of stele are: protostele (most primitive and simple), siphonostele. Solenostele, dictyostele, eustele and atactostele.     Cortex and its type - Cortex lies in between...
Medical
87 Views   |  

Smooth muscles are

  • Option 1)

    Involuntary, fusiform, non-striated

  • Option 2)

    Voluntary, multinucleate, cylindrical

  • Option 3)

    Involuntary, cylindrical, striated

  • Option 4)

    Voluntary, spindle-shaped, uninucleate

 
As discussed in concept Smooth muscles - Smooth muscles are involuntary and non-striped or non-striated. -     Option 1) Involuntary, fusiform, non-striated Option is correct Option 2) Voluntary, multinucleate, cylindrical Option is incorrect Option 3) Involuntary, cylindrical, striated Option is incorrect Option 4) Voluntary, spindle-shaped, uninucleate Option is incorrect
Medical
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In male cockroaches, sperms are stored in which part of the reproductive system?

  • Option 1)

    Seminal vesicles

  • Option 2)

    Mushroom glands

  • Option 3)

    Testes

  • Option 4)

    Vas deferens

 
As discussed in concept Spermatophores in cockroach - The sperm are stored in the seminal vesicles and are glued together in the form of bundles called spermatophores and discharged during copulation -     Option 1) Seminal vesicles Option is correct Option 2) Mushroom glands Option is incorrect Option 3) Testes Option is incorrect Option 4) Vas deferens Option is incorrect
Medical
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Radial symmetry is found in the flowers of

  • Option 1)

    Brassica

  • Option 2)

    Trifolium

  • Option 3)

    Pisum

  • Option 4)

    Cassia

 
None As discussed in Actinomorphic flower - When a flower can be divided into two equal halves by many vertical sections passing through the center called actinomorphic or radial - wherein eg: cruciferae, malvaceae   Radial or actinomorphic symmetry are found in Brassica flowers. Option 1) Brassica This solution is correct. Option 2) Trifolium This solution is incorrect. Option 3) Pisum This...
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