Answer
Verified
450.3k+ views
Hint: The arrangement of leaves in a different rotational angle of the stem which is found to be in various patterns naturally and shows the variation in different plants.
Complete step by step answer:
Phyllotaxy or phyllotaxy is the arrangement derived from the Greek word phyllon meaning “leaf” and taxis meaning “arrangement”. The pattern of arrangement of the leaves on the stem of the plants is phyllotaxy. Spiral phyllotaxy has a single leaf on each node.
The term phyllotaxy was coined by Charles Bonnet to describe the arrangement of leaves on a plant.
There are three basic types of phyllotaxy in plants, they are:
Opposite phyllotaxy – it is the basic arrangement of leaves on the stem. From the opposite sides of the stem from its base, two leaves arise.
Spiral phyllotaxy – in this arrangement only a single leaf arises at each node and borne along the stem alternately in an ascending spiral.
Whorled phyllotaxy – in this arrangement, several leaves may arise from the same node on a stem.
With an alternate or spiral arrangement, each leaf arises at a different node on the stem.
The rotational angle from the leaf in a repeating spiral can be represented by a fraction of a full rotation around the stem.
So, the correct answer is ‘(a) One'.
Note: Leonardo da Vinci made observations of the spiral arrangements of plants first. In 1754, Charles Bonnet observed that the spiral phyllotaxy of plants was frequently expressed in both clockwise and anticlockwise golden ratio series. The mathematical observations of phyllotaxy were done by Karl Friedrich Schimper and his friend Alexander Braun in 1830.
Complete step by step answer:
Phyllotaxy or phyllotaxy is the arrangement derived from the Greek word phyllon meaning “leaf” and taxis meaning “arrangement”. The pattern of arrangement of the leaves on the stem of the plants is phyllotaxy. Spiral phyllotaxy has a single leaf on each node.
The term phyllotaxy was coined by Charles Bonnet to describe the arrangement of leaves on a plant.
There are three basic types of phyllotaxy in plants, they are:
Opposite phyllotaxy – it is the basic arrangement of leaves on the stem. From the opposite sides of the stem from its base, two leaves arise.
Spiral phyllotaxy – in this arrangement only a single leaf arises at each node and borne along the stem alternately in an ascending spiral.
Whorled phyllotaxy – in this arrangement, several leaves may arise from the same node on a stem.
With an alternate or spiral arrangement, each leaf arises at a different node on the stem.
The rotational angle from the leaf in a repeating spiral can be represented by a fraction of a full rotation around the stem.
So, the correct answer is ‘(a) One'.
Note: Leonardo da Vinci made observations of the spiral arrangements of plants first. In 1754, Charles Bonnet observed that the spiral phyllotaxy of plants was frequently expressed in both clockwise and anticlockwise golden ratio series. The mathematical observations of phyllotaxy were done by Karl Friedrich Schimper and his friend Alexander Braun in 1830.
Recently Updated Pages
Who among the following was the religious guru of class 7 social science CBSE
what is the correct chronological order of the following class 10 social science CBSE
Which of the following was not the actual cause for class 10 social science CBSE
Which of the following statements is not correct A class 10 social science CBSE
Which of the following leaders was not present in the class 10 social science CBSE
Garampani Sanctuary is located at A Diphu Assam B Gangtok class 10 social science CBSE
Trending doubts
Which are the Top 10 Largest Countries of the World?
How do you graph the function fx 4x class 9 maths CBSE
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
The only snake that builds a nest is a Krait b King class 11 biology CBSE
The Equation xxx + 2 is Satisfied when x is Equal to Class 10 Maths
In Indian rupees 1 trillion is equal to how many c class 8 maths CBSE
Give 10 examples for herbs , shrubs , climbers , creepers
Why is there a time difference of about 5 hours between class 10 social science CBSE
Which places in India experience sunrise first and class 9 social science CBSE