Tag: botany

In pea and bean, five types of petals are present. The largest petal (standard) overlaps the two lateral petals (wings), which in turn overlap two smallest anterior petals, which are known as keel. 

Zygomorphic flowers that are bilaterally symmetrical so that they are able to be bisected into similar halves in only one plane, forming mirror images, e.g., Gladiolus flower.

Unisexual flowers have either the male reproductive part (stamens) or female reproductive part (pistil) but never both.
As the flowers contain either the stamen or pistil, the fertilization can take place when the pollen from another flower or plant comes near the pistil. As there will be fusion of male and female gametes from different individuals of the same species, it results in cross-fertilization.
When the ovary (female reproductive part) ripens, it forms the fruit. So, when a plant contains only stamen, female reproductive part, it cannot produce a fruit.
Thus, the correct answer is option (B).

Tetradynamous is a condition of androecium where six stamens are present of which four stamens are longer and are inserted in inner whorl and remaining two are smaller and are inserted in outer whorl. 
Cruciform corolla is a type of corolla containing four free petals arranged in the form of a cross. 
Solanum tuberosum flower contains five fused petals forming a infundibulum form corolla.
Abelmoschus esculentus and Ochroma lagopus belongs to family Malvaceae. Both contain five free petals. 
Brassica campestris flower possess four free petals forming a cruciform corolla (arranged in the form of a cross). 
Therefore, the correct answer is option D.

There are two clusters each with 3-9 flowers on a node in the axis of opposite leaf and each cluster has a condensed dichasial cyme ending in monochasial cyme and flowers have lever mechanism, it represents Verticillaster. A cymose inflorescence arranged in pairs at the nodes, in the manner of a false whorl, is called a verticillaster. A reduced raceme or cyme that grows in the axis of a bract is called a fascicle. A verticillaster is a fascicle with the structure of a dichasium; it is common among the Laminaceae. Many verticillasters with reduced bracts can form a spicate (spike-like) inflorescence that is commonly called a spike.

Solanaceae is called the 'brinjal family'. It includes about 90 genera and 2000 species.
The gynoecium is bicarpellary, syncarpous, bilocular or tetralocular due to pseudoseptum many ovules on axile placentation. Ovary is superior, obliquely placed.
Thus, the correct answer is option (A), 'Solanaceae.

Cyathium - Here, the inflorescence is highly reduced. It has a cup shaped receptacle formed by the fusion of five bracts. On the surface of this cup, generally a yellow colored nectar secreting gland is present. A single female flower arises from the center of the cup. It is highly reduced and is borne on a long stalk. The multiple male flowers are highly reduced and are produced in a scorpioid manner from the axil of each bract e.g. Euphorbia pulcherrima. 
Therefore, the correct answer is option B.

Kenaf or Hibiscus cannabinus, is a plant in the Malvaceae family. Hibiscus cannabinus is in the genus Hibiscus and is probably native to southern Asia, though its exact natural origin is unknown. The name also applies to the fiber obtained from this plant. Kenaf is one of the allied fibers of jute and shows similar characteristics. Alcea rosea is an ornamental plant in the Malvaceae family. Malvestrum tricuspidatum and Malvaviscus arboreus belongs to family Malvaceae but they are not fiber yielding plants. 
Therefore, the correct answer is option B.

The stalk of the flower is called pedicel. The flowers that have pedicel are called pedicellate. Pedicel attaches the flower to the inflorescence.

A. Pedicellate is the term used for those flowers that have pedicel.

B. Petiolate is the term used for those leaves that have stalk called petiole.

C. The term sessile indicates an absence of any stalk. Both the flowers and the leaves can be sessile.

D. The subsessile condition arises when there is very short stalk.

Hence, the correct answer is 'Pedicellate'