Question

Spike has?
A. Pedicellate flowers
B. Complete flowers
C. Sessile flowers
D. Unisexual flowers

Answer 1

Hint The science of morphology is concerned with the study of the form and structure of objects. A flowering plant's morphology includes the roots, stem, leaves, flowers, and fruits, regardless of which plant it is.

Complete answer:
A group or cluster of flowers arranged on a stem composed of a main branch or a complicated arrangement of branches is known as an inflorescence. It is the modified part of the seed plant's shoot where flowers are formed morphologically.
The length and nature of the internodes and phyllotaxis, as well as variations in proportions, compressions, swellings, adnations, connotations, and reduction of main and secondary axes, are all possible modifications. A plant's reproductive portion that bears a cluster of flowers in a specific pattern is also known as an inflorescence.
A spike is a raceme, but unlike barley, the flowers develop directly from the stem rather than on pedicels (Hordeum).
Raceme with bisexual and pedicellate flowers arranged acropetally on the peduncle. It's a racemose inflorescence of some sort. A radish is a good example.
An inflorescence is the complete arrangement of flowers on the plant's floral axis. Racemose and cymose are the two main types.
Spike with bisexual and sessile flowers on the peduncle. It's a racemose inflorescence of some sort. Achyranthes is a good example.
Catkin is a pendulous spike that bears unisexual flowers in the leaf axis. It's a racemose inflorescence of some sort. Oak is a good example.
So, the spike has Sessile flowers.

Thus, the answer is option C: Sessile flowers.

Note: A peduncle is a stem that holds the entire inflorescence. The rachis is the major axis above the peduncle bearing the flowers or secondary branches (incorrectly referred to as the main stem). A pedicel is the stalk of each flower in the inflorescence. A solitary flower is not part of an inflorescence, and its stalk is also known as a peduncle.