Question
Identify the correct option for $A$ and $B$
| Compound | Function |
| $2,4-D$ | $A$ |
| $B$ | Fruit ripening |
✓
Answer
d
$(i)$ $2-4- D$ is an auxin, which is widely used as weedicide for dicotyledonous Weeds.
$(i)$ $2-4- D$ is an auxin, which is widely used as weedicide for dicotyledonous Weeds.
$(ii)$ Ethylene causes fruit ripening
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Which of the following correctly defines a transgenic animal
When dividing cells are examined under a light microscope, chromosomes become visible in
Which is the "Only enzyme" that has "Capability" to catalyse Initiation, Elongation and Termination in the process of transcription in prokaryotes?
Bacteria are grouped under four categories based on their shape. Study the given figure and identify $P,Q,R$ and $S$
→Mortality is
Which one of the following statements are correct ?
(i) Chromatids start moving towards opposite poles in anaphase.
(ii) Crossing over occurs between non-sister chromatids of homologous chromosomes.
(iii) Crossing over occurs in tetrad stage which occurs in pachytene of prophase I of meiosis I.
(iv) Chromosomes move to the spindle equator and get aligned along equatorial plate in metaphase.
(v) Crossing over is the reciprocal transfer of genes between the non-homologous chromosomes
(vi) M phase represents the phase when actual cell division occurs and I phase represents the phase between two successive M phase.
(vii) In the 24 hours, average duration of cell cycle of a human cell, cell division proper lasts for only about an hour.
(viii) M phase constitutes more than 95% of the duration of cell cycle.
Choose the correct option given below :-
(i) Chromatids start moving towards opposite poles in anaphase.
(ii) Crossing over occurs between non-sister chromatids of homologous chromosomes.
(iii) Crossing over occurs in tetrad stage which occurs in pachytene of prophase I of meiosis I.
(iv) Chromosomes move to the spindle equator and get aligned along equatorial plate in metaphase.
(v) Crossing over is the reciprocal transfer of genes between the non-homologous chromosomes
(vi) M phase represents the phase when actual cell division occurs and I phase represents the phase between two successive M phase.
(vii) In the 24 hours, average duration of cell cycle of a human cell, cell division proper lasts for only about an hour.
(viii) M phase constitutes more than 95% of the duration of cell cycle.
Choose the correct option given below :-
People recovering from long illness are often advised to include the alga Spirulina in their diet because it
Match the column $I$ and $II$
→| Column $I$ | Column $II$ |
| $(i)$ Chrysophyte | $(a)$ Gonyaulax |
| $(ii)$ Dinoflagellate | $(b)$ Euglena |
| $(iii)$ Euglenoids | $(c)$ Diatom |
| $(iv)$ Slime moulds | $(d)$ Plasmodium |
Which of the following statement correct for auxin ?
(i) Spraying juvenile conifers with auxin hastens the maturity period, thus leading to early seed production.
(ii) Promotes bolting in beet, cabbages and many plants with rosette habit.
(iii) It helps to produce new leaves, chloroplasts in leaves, lateral shoot growth and adventitious shoot formation.
(iv) Their ability to cause an increase in length of axis is used to increase the length of grapes stalks.
(v) It helps to initiate rooting in stem cuttings.
(vi) It promotes flowering e.g., in pineapples.
(i) Spraying juvenile conifers with auxin hastens the maturity period, thus leading to early seed production.
(ii) Promotes bolting in beet, cabbages and many plants with rosette habit.
(iii) It helps to produce new leaves, chloroplasts in leaves, lateral shoot growth and adventitious shoot formation.
(iv) Their ability to cause an increase in length of axis is used to increase the length of grapes stalks.
(v) It helps to initiate rooting in stem cuttings.
(vi) It promotes flowering e.g., in pineapples.
In $DNA$ molecule, which of the following base pair is present
→