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300 questions in this collection · Page 6 of 30
Question 51 of 300
📘 CLASS XI
Morphology Of Flowering Plants
In alternate type of phyllotaxy, a single leaf arises at each node in an alternate manner. Which of the following sets represents alternate phyllotaxy?
In alternate type of phyllotaxy, a single leaf arises at each node in alternate manner, as in china rose, mustard and sun flower plants.
Question 52 of 300
📘 CLASS XI
Morphology Of Flowering Plants
In opposite phyllotaxy, a pair of leaves arise at each node and lie opposite to each other. This is seen in:
In opposite type, a pair of leaves arise at each node and lie opposite to each other as in Calotropis and guava plants.
Question 53 of 300
📘 CLASS XI
Morphology Of Flowering Plants
If more than two leaves arise at a node and form a whorl, it is called whorled phyllotaxy. An example is:
If more than two leaves arise at a node and form a whorl, it is called whorled, as in Alstonia.
Question 54 of 300
📘 CLASS XI
Morphology Of Flowering Plants
In racemose type of inflorescence, how is the main axis and the arrangement of flowers described?
In racemose type of inflorescences the main axis continues to grow, the flowers are borne laterally in an acropetal succession.
Question 55 of 300
📘 CLASS XI
Morphology Of Flowering Plants
In cymose type of inflorescence, the main axis terminates in a flower, which limits its growth. The flowers are borne in a:
In cymose type of inflorescence the main axis terminates in a flower, hence is limited in growth. The flowers are borne in a basipetal order.
Question 56 of 300
📘 CLASS XI
Morphology Of Flowering Plants
The flower is the reproductive unit in angiosperms and is meant for:
The flower is the reproductive unit in the angiosperms. It is meant for sexual reproduction.
Question 57 of 300
📘 CLASS XI
Morphology Of Flowering Plants
When a flower can be divided into two equal radial halves in any radial plane passing through the centre, it is called ______ as seen in ______.
When a flower can be divided into two equal radial halves in any radial plane passing through the centre, it is said to be actinomorphic, e.g., mustard, datura, chilli.
Question 58 of 300
📘 CLASS XI
Morphology Of Flowering Plants
When a flower can be divided into similar halves only in one particular vertical plane, it is zygomorphic. Examples include:
When a flower can be divided into two similar halves only in one particular vertical plane, it is zygomorphic, e.g., pea, gulmohur, bean, Cassia.
Question 59 of 300
📘 CLASS XI
Morphology Of Flowering Plants
Which of the following flowers is asymmetric (irregular) and cannot be divided into two similar halves by any vertical plane passing through the centre?
A flower is asymmetric (irregular) if it cannot be divided into two similar halves by any vertical plane passing through the centre, as in canna.
Question 60 of 300
📘 CLASS XI
Morphology Of Flowering Plants
A flower is described as hypogynous when the gynoecium occupies the highest position on the thalamus, and its ovary is said to be:
In the hypogynous flower the gynoecium occupies the highest position while the other parts are situated below it. The ovary in such flowers is said to be superior.