Blog 2: Flower Dissection ( Biology Practical periods 6th & 7th )

Good morning dear Students.
Kindly mark your Attendance for Practicals once again.

Today we will achieve the following Learning outcomes :-
Students will be able to -
1. Define each whorl of the Hibiscus rosa-sinensis  flower.

2. Dissect each whorl of the flower.

3. Analyse Transverse Section of Ovary.


GENERAL INSTRUCTIONS :-

1. Today we will do Experiment 2 that is Dissection of Hibiscus flower.

2. In this blog I will give you the written file work in format. Kindly follow that only while writing this experiment in your practical file.

3. You will draw the given floral diagram on the blank side, where you start with the description of the flower.

4. Since you are not able to do this dissection now. I have send 2 YouTube video links with this blog.

Watch the links in order

First  watch " PARTS of FLOWER "
This will give you an idea of how many parts the flower is divided into.

Then Watch the second YouTube video link " Dissection of flower & TS of ovary ".
This video will help you understand how we need to do the dissection of Hibiscus rosa-sinensis in Lab. This we will do once the school reopens for us.

5. Try & get your file sheets arranged so you can complete your Practical file work. It is really vast & we may not have time in the end.



So Let's Begin




OBSERVATION :-




(Write only kingdom, order, family, genus & species from the Scientific Classification)





WRITE the Floral Formula & Floral Diagram on the blank sheet adjacent to where you will write your OBSERVATION.









PRECAUTIONS :-


----------------------------------------------------------------------
QUIZ

Answer the following questions here on the blog comment space after watching the whole dissection  video & read the flower description:-

1. What is Flower?

2. How many whorls does a flower have?

3. Mention the four whorls of a flower?

4. Which Dicotyledonous flower have you studied?

5. What do you understand by the following symbols in the floral formula :-






--------------------------------------------------------------------

I will now see you tomorrow according to Day 1 timetable.


Comments

  1. Unknown27 April 2020 at 11:26

    Jaskeerat Singh (11-D) -Present

    ReplyDelete
  2. Dhruv Ghoshal27 April 2020 at 11:26

    Good Morning Ma'am
    Dhruv Ghoshal 11 D present

    ReplyDelete
  3. Celestine27 April 2020 at 11:27

    Good morning ma'am,
    Celestine Saji,
    Present

    ReplyDelete
  4. Unknown27 April 2020 at 11:28

    Albin G Koshy
    11-D
    Present

    ReplyDelete
  5. Unknown27 April 2020 at 11:29

    Lakshya Gunjan
    11-D
    Present

    ReplyDelete
  6. TEGHVEER SINGH27 April 2020 at 11:29

    GOOD MORNING MA'AM
    TEGHVEER SINGH
    CLASS 11-D
    PRESENT

    ReplyDelete
  7. Anugrah Steve Massey27 April 2020 at 11:32

    Good morning ma'am. Anugrah Steve Massey 11D present

    ReplyDelete
  8. Samuel27 April 2020 at 11:33

    Good morning ma'am
    Samuel DM 11-D
    Present

    ReplyDelete
    Replies
    1. Samuel27 April 2020 at 12:20

      A1) Flower is the reproductive part of a plant.
      A2) 4whorls
      A3) Calyx, Corolla, Androecium, Gynoecium.
      A4) hibiscus
      A5) a- actinomorphic
      b- petasepalous calyx
      c- indefinite no. of androecium.

      Delete
  9. Oyster peter27 April 2020 at 11:35

    OYSTER DCOSTA 11 D PRESENT MA'AM

    ReplyDelete
  10. Unknown27 April 2020 at 11:36

    Good morning
    Bhumik Tandon of class 11th D is present

    ReplyDelete
    Replies
    1. Unknown27 April 2020 at 11:55

      1) The colored part of a plant or tree from from which seeds or fruit grows.
      2) flowers have 4 floral whorls
      3) they are :-
      1) Calyx- made up of sepals
      2) Carolla- made up of petals
      3) Androecium- made up of stamen
      4) Gynoecium- made up of carpel
      4) Hibiscus
      5) a)adelphous
      b)sygeneclaus
      c)synandrous
      2) Calyx
      3) Androecium

      Delete
    2. scs_vcn_biology27 April 2020 at 11:58

      Answer 5 is wrong. Check it again in the video. You have to explain me all the three parts a, b, c in details... Like what does number, bracket means, infinity sign means???

      Delete
    3. Unknown27 April 2020 at 11:59

      *5)a actinomorphic
      b petasepalous calyx
      c infinite no. of androecium.

      Delete
    4. scs_vcn_biology27 April 2020 at 12:04

      Bhumik are sepals free or joint??

      Delete
  11. Suchit Bhatnagar27 April 2020 at 11:36

    Good Morning ma'am
    Suchit Bhatnagar 11-D present

    ReplyDelete
  12. Unknown27 April 2020 at 11:36

    Amit S Sahu 11 D Present

    ReplyDelete
  13. Artham27 April 2020 at 11:37

    Good morning ma'am
    Artham Pedneker 11-D
    Present

    ReplyDelete
  14. Unknown27 April 2020 at 11:37

    good morning ma'am
    sami ansari 11-D
    present

    ReplyDelete
  15. Tathastu Bagchi27 April 2020 at 11:38

    Tathastu Bagchi 11D present

    ReplyDelete
    Replies
    1. Tathastu Bagchi27 April 2020 at 12:26

      1)The reproductive part of the plant is the flower
      2)flower has four whorls
      3)these are
      Calyx
      Carolla
      Androecium
      Gynoecium
      4)Hibiscus

      Delete
  16. ALLAN27 April 2020 at 11:38

    Good morning ma'am
    Amal Roy Joseph 11D
    Present

    ReplyDelete
  17. Unknown27 April 2020 at 11:39

    Jaskeerat Singh (11-D) - Present
    Ans1) The colored part of a plant or tree from from which seeds or fruit grows.
    2) flowers have 4 floral whorls
    3) they are :-
    1) Calyx- made up of sepals
    2) Carolla- made up of petals
    3) Androecium- made up of stamen
    4) Gynoecium- made up of carpel
    4) Hibiscus
    5) 1) Actinomorphic
    2) Calyx
    3) Androecium

    ReplyDelete
    Replies
    1. scs_vcn_biology27 April 2020 at 11:45

      Jaskeerat your answer number 5 is still incomplete.
      Have to watched video link one.
      You still have to explain me the meaning of bracket, & number.
      What is the type of Androecium??

      Delete
    2. Unknown27 April 2020 at 11:52

      Q5)(c)Androecium is fused based on fusion androecium is further divided into the following types:-
      1) if filament is fused and antger is free - Adelphous
      2) if anther is fused and filament is free - Sygeneclaus
      3) if both filament and anther are fused - synandrous

      Delete
    3. scs_vcn_biology27 April 2020 at 11:53

      So here which condition is referred to Jaskeerat

      Delete
    4. Unknown27 April 2020 at 12:00

      5(c) Calyx contains five sepals and the sepals are fuesed ie gamosepelous
      It is further divided into
      Persistant Calyx ie if the sepals are fused to the flowereg brinjal pomegranate

      Delete
    5. scs_vcn_biology27 April 2020 at 12:05

      Good work. Now you get it

      Delete
    6. Unknown27 April 2020 at 12:25

      In Q5 (b) . In Hibiscus, base of filament of same size stamen is attached to stem and forms a staminal column or staminal tube i.e. a single, compound structure, they are monadelphous.

      Delete
  18. JOSEPH27 April 2020 at 11:40

    Joseph James Nedumpara
    XI D

    ReplyDelete
  19. Anugrah Singh27 April 2020 at 11:40

    This comment has been removed by the author.

    ReplyDelete
  20. Anugrah Singh27 April 2020 at 11:41

    Good morning ma'am
    Anugrah Singh 11D
    Present

    ReplyDelete
  21. Rahul Bandhu27 April 2020 at 11:43

    Good morning ma'am
    Rahul Bandhu
    11D

    ReplyDelete
    Replies
    1. Rahul Bandhu27 April 2020 at 12:34

      1)It is the reproductive organ of the plant
      2)4
      3)Calyx, Corola,Androecium, Gynoecium
      4) Hibiscus
      5.a.)Actinomorphic flower
      b.)Flower has 5 sepals which are joint(gamosepalous)
      c.)no of Androecium
      Infinite?

      Delete
  22. Aaron Isaac Khakha27 April 2020 at 11:43

    Aaron Isaac Khakha
    11D
    Present

    ReplyDelete
  23. Yumn Jame27 April 2020 at 11:45

    This comment has been removed by the author.

    ReplyDelete
  24. Yumn Jame27 April 2020 at 11:47

    Good morning ma'am,
    Yumn jame 11th D present
    A1) Flower is the reproductive part of a plant.
    A2) 4whorls
    A3) Calyx, Corolla, Androecium, Gynoecium.
    A4) hibiscus
    A5) a- actinomorphic
    b- petasepalous calyx
    c- indefinite no. of androecium.

    ReplyDelete
    Replies
    1. scs_vcn_biology27 April 2020 at 11:53

      Yumn... Are sepals free or joint???

      Delete
    2. Yumn Jame27 April 2020 at 11:57

      This comment has been removed by the author.

      Delete
    3. Yumn Jame27 April 2020 at 11:59

      Joint, ma'am

      Delete
    4. scs_vcn_biology27 April 2020 at 12:06

      So this condition is called gamosepalous in calyx so the correct answer is calyx : gamosepalous with pentamerous sepals.

      Delete
    5. Yumn Jame27 April 2020 at 12:16

      Okay ma'am, thank you.

      Delete
  25. Celestine27 April 2020 at 11:56

    Ma'am the answers to the quiz are
    1.Flower is a beautiful and attractive part of a plant which aids in the process of reproduction.
    2.A flower has 4 whorls
    3.The four whorls are-
    1Calyx-the outermost wall consisting of sepals(protect the flower in the bud stage)
    Can be free or United
    When free they are known as polysepalous and when United they are known as gamosepalous.
    2 Corola-innert the calyx we have the corola which consists of petals.they exist in different shapes like wheel,funnel,bell,tubular.There primary function is to attract insects and birds for pollination.
    3.Androecium-inner to the corola which consists of the stamen a stock i.e.the filament and the anther which contains sacs of polen grains.
    4.Gynoecium-contain the male reproductive part the stigma,the style and the ovary

    5.(a)Actinomorphic flower
    (b) Calyx of 5
    (c)stamen which number 12+ due to the infinity symbol

    ReplyDelete
    Replies
    1. scs_vcn_biology27 April 2020 at 12:00

      Good work Celestine.
      But what does bracket symbolises in calyx??

      Delete
  26. Celestine27 April 2020 at 11:57

    4.Hibiscus

    ReplyDelete
  27. Krrishvarshney27 April 2020 at 12:01

    Krrishvarshney 11d present ) Flower is the reproductive part of a plant.
    A2) 4whorls
    A3) Calyx, Corolla, Androecium, Gynoecium.
    A4) hibiscus

    ReplyDelete
    Replies
    1. scs_vcn_biology27 April 2020 at 12:13

      Krrish your Answer 5 is not mentioned... Would you like to try it, then I will clarify what is means

      Delete
  28. Celestine27 April 2020 at 12:04

    Ma'am I was trying to refer to one of the primary functions of the sepals

    ReplyDelete
    Replies
    1. scs_vcn_biology27 April 2020 at 12:08

      According to Floral description rule it is still incomplete till you explain each & every symbol of the floral formula.
      So bracket symbol is very important. Just mention what is symbolises.

      Delete
  29. Anugrah Singh27 April 2020 at 12:05

    1.A flower is that part of a plant which contributes to reproduction.
    2.A flower has 4 whorls.
    3.The 4 whorls of a flower are: Calyx, Corolla, Androecium and Gynoecium.
    4.Hibscus rosa-sinensis.
    5.a.)Actinomorphic flower
    b.)Flower has 5 sepals
    c.)Androecium

    ReplyDelete
    Replies
    1. Anugrah Singh27 April 2020 at 12:08

      5.)b.)Flower has 5 sepals which are joint.
      c.)No. of androecium is indefinite.

      Delete
    2. scs_vcn_biology27 April 2020 at 12:10

      Anugrah... Jointed sepals are called gamosepalous condition.

      Rest answers are correct. Good work

      Delete
  30. Unknown27 April 2020 at 12:08

    Pulkit Kohli 11-D Present
    A1) Flower is the reproductive part of a plant.
    A2) 4whorls
    A3) Calyx, Corolla, Androecium, Gynoecium.
    A4) hibiscus
    A5) a- actinomorphic
    b- petasepalous calyx

    ReplyDelete
    Replies
    1. scs_vcn_biology27 April 2020 at 12:11

      Hi pulkit... You forgot to mark your attendance for theory class. Kindly do so now.

      Your Answer 5 is incomplete.
      You have to explain the meaning of bracket, infinity sign also

      Delete
  31. Unknown27 April 2020 at 12:25

    sami ansari
    1)A flower is the part of a plant that is responsible for making new seeds. It is often made of petals and may have an attractive scent.
    2)4
    3)calyx
    corolla
    stamen
    carpel
    4)china rose
    5) K5 indicates a calyx of five sepals A ∝ (infinity) is used and + actinomorphic

    ReplyDelete
    Replies
    1. scs_vcn_biology27 April 2020 at 12:32

      Sami is calyx fused or free??
      How are Androecium fused or free??

      Delete
  32. Albin27 April 2020 at 12:26

    Good morning maam
    Albin Chandi 11 D
    Present
    1) The colored part of a plant or tree from from which seeds or fruit grows.
    2) flowers have 4 floral whorls
    3) they are :-
    1) Calyx- made up of sepals
    2) Carolla- made up of petals
    3) Androecium- made up of stamen
    4) Gynoecium- made up of carpel
    4) Hibiscus
    5)a) actinomorphic flower
    b)no.of sepals is 5
    c)many no. of stamen

    ReplyDelete
    Replies
    1. scs_vcn_biology27 April 2020 at 12:33

      Albin calyx are fused or free??
      Androecium is fused or free??

      Delete
    2. Albin27 April 2020 at 12:53

      Maam actually the calyx in gamosepalous which means it is fused .
      Also the androceuim is monadelphous .

      Delete
  33. Unknown27 April 2020 at 12:26

    Amit S Sahu 11 D
    1. A flower is the coloured part of the plant or tree, which aids in reproduction and from which the seeds or the fruit grows.
    2. 4 whorls
    3. They are:
    Calyx, Corolla, Androecium and Gynoceium
    4. Hibiscus
    5. a) actinomorphic
    b) gamosepalous with pentamerous sepals
    c) no. of androecium is infinite

    ReplyDelete
  34. Celestine27 April 2020 at 12:30

    Maam the use of bracket s is that like if ther are 5 sepals and they are free they are written as k5 and if United the number is denoted by brackets i.e k(5).
    Ma'am I am celestine

    ReplyDelete
    Replies
    1. scs_vcn_biology27 April 2020 at 12:35

      Good work Celestine. This type of calyx formed is called Gamosepalous conditions.
      And Androecium is monoadelphous with infinite stamens.

      Delete
  35. Dhruv Ghoshal27 April 2020 at 12:31

    1. A flower is the reproductive part of a plant
    2. A flower has 4 whorls.
    3. The 4 whorls of a flower are: Calyx, Corolla, Androecium and Gynoecium.
    4. Hibscus rosa-sinensis.
    5. a.) Actinomorphic flower
    b.)Flower has 5 sepals
    c.)Androecium

    ReplyDelete
  36. ALLAN27 April 2020 at 12:36

    Amal Roy
    answers to the quiz
    1)The reproductive part of the plant is the flower
    2)flower has four whorls
    3)these are
    Calyx
    Carolla
    Androecium
    Gynoecium
    4)Hibiscus
    5. a) actinomorphic
    b) gamosepalous with pentamerous sepals
    c) no. of androecium is infinite

    ReplyDelete
  37. scs_vcn_biology27 April 2020 at 12:36

    Dhruv are sepals free / fused.
    How is Androecium.. Fused / free??
    Are the occuring in bundles?? If yes then how many??

    ReplyDelete
  38. JOSEPH27 April 2020 at 12:39

    Joseph James Nedumpara
    XI D

    1. It is a part of the plant that grows to form a fruit. It can be found in many colours.
    2. 4 whorls
    3. calyx, corolla, androecium, and gynoecium.
    4. magnolias, roses, geraniums, and hollyhocks are dicots.
    5. 1.
    2. 5 petals
    3. infinity petals

    ReplyDelete
  39. Anugrah Steve Massey27 April 2020 at 12:42

    Anugrah Steve Massey 11D
    1. Flower is the coloured reproductive part of a plant.
    2. 4 whorls
    3. The 4 whorls are:
    Calyx, corolla, gynoecium and androecium.
    4. Hibiscus
    5. A. Actinomorphic
    flower
    B. 5 sepals of calyx
    C. No. of adroecium is infinite.

    ReplyDelete
  40. Unknown27 April 2020 at 12:52

    TEGHVEER SINGH
    1. Flower is the coloured reproductive part of a plant.
    2. 4 whorls
    3. The 4 whorls are:
    Calyx, corolla, gynoecium and androecium.
    4. Hibiscus 
    5. A. Actinomorphic
    flower
    B. 5 sepals of calyx
    C. No. of adroecium is infinite

    ReplyDelete

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