What are underground modified stems and what are its types ?
Underground modified stems are found under the surface of soil and store food materials due to which they become quite thick and fleshy. They are usually brownish,whitish or yellowish…
Archive | Science
What are the parts of a typical leaf ?
A typical foliage leaf has three main parts. They are leaf base, petiole and lamina which are discussed in detail….
What are the different kinds of leaves ?
On the basis of origin and function, leaves are of he following types like Cotyledonary Leaves, Bract leaves or hypsophylls, Scale leaves or cataphylls, Prophylls, Floral leaves or sporophylls…
What are Stipules and what are its types ?
Leaves of some plants have lateral appendages on each side of leaf base, known as stipules. The leaves without stipules are known as exstipulate. Stipules are usually green, but sometimes appear…
What is the difference between Phylloclade & Phyllode ?
The difference between Phylloclade & Phyllode are Phylloclade is the modification of stem whereas Phyllode is the modification of petiole…
What is the difference between a simple and a compound leaf ?
The difference between a simple and a compound leaf are simple leaf has a single lamina whereas compound leaf is divided into many small leaf-lets….
What is a flower and what are the 4 floral whorls ?
Flower is a group of reproductive organs of the flowering plants, which develops fruits and seeds and thus helps in forming new offspring of the plant. From morphological point of view flower is…
What are the differences between branch bearing simple leaves & a compound leaf ?
The difference between branch bearing simple leaves & a compound leaf are in branch bearing simple leaves a branch develops from the axillary bud present in the axil of a leaf whereas in compound leaf…
What is calyx of a flower ?
Calyx is the outer-most whorl and is made up of sepals which are usually green but sometimes coloured (petaloid) as in garden nasturtium. In dicotyledons usually the number of sepals is five and in monocotyledons usually three…
The parts of a flower–Corolla
Corolla is the second whorl of flower and made up of petals. In dicotyledons the number of petals is usually five (variation from 2-10) and in monocotyledons three. The petals may be polypetalous…
What are the kinds of ovules ?
The kinds of ovules are Orthotropous (Straight), Anatropous (Inverted), Hemitropous, Campylotropous, Amphitropous, Circinotropous…
Parts of a flower–Androecium, Gynoecium and placentation
The parts of a flower are androecium, gynoecium and placentation which are explained...
What is polyembryony ?
Polyembryony is the phenomenon of development of more than one embryos in a seed. It was discovered by Leeuwenhock in 1719 in orange. It may be of two types…
What is apomixis ?
The substitution of usual sexual reproduction by a form of reproduction which does not involve meiosis and syngamy is called apomixis, a term introduced by Winkler in 1908...
Complete information on Endosperm, its types and histology
The endorsperm is important because it is the main source of food for the embryo. In gymnosperms it is haploid and is formed by the repeated divisions of megaspore nucleus, (i.e., female gametophyte and…
What are the factors affecting transpiration in plants ?
Factors affecting the rate of transpiration in plants are divided into two i.e. external factors and internal factors…