Growth movement of pollen tube towards the egg is:
Correct answer: B. Chemotropism
- A. Hydrotropism
- B. Chemotropism
- C. Chemotactic
- D. Seismetactic
Explanation
Chemotropism: Chemotropism is the growth movement of a plant part towards or away from a chemical stimulus. In the context of a pollen tube, it can refer to the growth movement towards the chemical signals released by the egg.Therefore, the most appropriate option for the growth movement of a pollen tube towards the egg is 'Chemotropism,' as it involves the growth response towards the chemical signals released by the egg.
This question appeared on the ETEA MDCAT 2009 paper, which you can sit online with every answer explained.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
About Plant Growth Regulators
Plant growth regulators are chemical messengers that control growth, development and responses to the environment. The topic covers auxins, gibberellins, cytokinins, abscisic acid and ethylene, including cell elongation, apical dominance, tropisms, seed germination, dormancy, fruit ripening and leaf fall, with growth promoters distinguished from inhibitors.
Practise Forms and Functions of Plants
272 free Forms and Functions of Plants MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Biology questions like this
Biology is on 8 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Plant Growth Regulators questions
The critical day length of Hyoscyamus for flowering is :
Size of the flower of chrysanthemum may be enlarged by removing
In plants, the red light favours:
Opening of flower buds and leaf buds is called;
The hormone that causes seed and bud dormancy in plants is called
The changes in the biochemical composition and physiology occurring at regular intervals in 24 hours is termed as: