EVERYDAY SCIENCE

Detailed explanation-1: -The male sex organ is spherical and yellow to red in colour, called globule. The female sex organ is oval and greenish in colour and called the nucule or oogonium. The sex organs are borne on the branch of limited growth mingled with secondary laterals.

Detailed explanation-2: -Nucule is the female sex organ and globule is the male sex organ in Chara. It is a freshwater green alga found attached to bottoms of shallow water of ponds, pools and lakes. It is commonly called aquatic horse tail because of jointed appearance.

Detailed explanation-3: -The male sex organs are called antheridium or globule and the female oogonium or nucule. Most of the Chara species are homothallic i.e., the male and male sex organs are borne on the same nodes, (Fig.

Detailed explanation-4: -Each globule consists of eight curved plates, situated towards the outer side, which are the shield cells. From the inner side of the each shield cell, a centrally placed rod shaped structure is developed, called the manubrium.

Detailed explanation-5: -They give rise to new plant upon germination. (ii) By Bulbils: Some of the rhizoids on the lower nodes may form bulbils which also give rise to new plants when detached. (iii) By Protonema like outgrowths: These arise from rhizoids and ultimately germinate into new plants. 2.