In vexillary (papilionaceous) aestivation, there are five petals. Which of the following describes their overlapping pattern?
In vexillary or papilionaceous aestivation (pea and bean), the largest (standard) overlaps the two lateral petals (wings) which in turn overlap the two smallest anterior petals (keel).
Question 72 of 300
📘 CLASS XI
The male reproductive organ of a flower is the androecium, composed of stamens. Each stamen consists of:
Each stamen which represents the male reproductive organ consists of a stalk or a filament and an anther.
Question 73 of 300
📘 CLASS XI
When stamens are attached to the petals, they are epipetalous, as in ______; and when attached to the perianth, they are epiphyllous, as in ______.
When stamens are attached to the petals, they are epipetalous as in brinjal, or epiphyllous when attached to the perianth as in the flowers of lily.
Question 74 of 300
📘 CLASS XI
Stamens may be united into one bunch or bundle (monoadelphous), two bundles (diadelphous), or more than two bundles (polyadelphous). These are seen respectively in:
Stamens may be united into one bundle (monoadelphous) as in china rose, or two bundles (diadelphous) as in pea, or into more than two bundles (polyadelphous) as in citrus.
Question 75 of 300
📘 CLASS XI
In which of the following plants does a variation in the length of filaments within a flower occur?
There may be a variation in the length of filaments within a flower, as in Salvia and mustard.
Question 76 of 300
📘 CLASS XI
Gynoecium is made up of one or more carpels, where each carpel consists of which three parts?
A carpel consists of three parts namely stigma, style and ovary.
Question 77 of 300
📘 CLASS XI
When more than one carpel is present in a flower, they are termed apocarpous when they are free, and syncarpous when they are fused. These are seen respectively in:
Carpels are called apocarpous when they are free (as in lotus and rose) and syncarpous when they are fused (as in mustard and tomato).
Question 78 of 300
📘 CLASS XI
Placentation is defined as:
The arrangement of ovules within the ovary is known as placentation.
Question 79 of 300
📘 CLASS XI
In marginal placentation, how are the ovules attached?
In marginal placentation the placenta forms a ridge along the ventral suture of the ovary and the ovules are borne on this ridge forming two rows, as in pea.
Question 80 of 300
📘 CLASS XI
Which of the following plants exhibits marginal placentation?
