Question

Give brief accounts of any five of the followings: (a) LS circinotropous ovule (b) Microspore of pinus (c) Trace fossils (d) cladodes (e) Ornithophily and Chiropterophily (f) Autogamy and Geitonogamy (g) Intrafascicular cambium and Biocolatoral vascular bundle​

Answer 1

$\huge\bold{LS\:circinotropous\:ovule}$

In Circinotropous ovule, the length of the funiculus becomes increased and so it covers the whole ovule. Circinotropous ovule is found in the family Cactaceae. Example, Opuntia. ... Cicer has Anatropous ovule in which body of ovule is rotated by 180° and micropyle comes near to funiculus.

$\huge\bold{Microspore\:of\:pinus}$

The microspore or pollen grain represents the male gametophyte, while the megaspore represents the first stage of female gametophyte which develops into a female gametophyte. ... The basic pattern of the development of male gametophyte of Pinus is similar to that of Ginkgo. The pollen grains undergo endosporic development.

$\huge\bold{Trace\:fossils}$

Ichnofossils, also known as trace fossils, are geological records of the activities and behaviors of past life. Some examples include rock evidence of nests, burrows, footprints, and scat. These fossils are different from body fossils that preserve the actual remains of a body such as shells or bones.

$\huge\bold{Cladodes}$

Cladodes (also called cladophylls or phylloclades) are shoot systems in which leaves do not develop; rather, the stems become flattened and assume the photosynthetic functions of the plant. In asparagus (Asparagus officinalis; Asparagaceae), the scales found on the asparagus spears are the true leaves.

$\huge\bold{Ornithophily\:and\:Chiropterophily}$

Cross pollination which takes place with the help of birds is called Ornithophily and flowers are called ornithophilous flowers. Some flowers may have edible parts. ... More commonly the birds with long narrow breaks are involved in Ornithophily e.g. Humming, Sunbirds, Honey birds, Crow, Bulbul.

Chiropterophily is pollination of plants by bats. Bat pollination is most common in tropical and desert areas that have many night-blooming plants. Just like bees and birds that pollinate, nectar-consuming bats have evolved ways to find and harvest the sweet liquid.