What Is Gymnosperm Seed?
Gymnosperms are the seed-producing plants, but as opposed to angiosperms, they produce seeds without fruits. These plants develop on the... View Article
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What Are The Characteristics Of Gymnosperm?
Listed below are few characteristics of gymnosperms – Inhabit colder regions where snow falls Naked seeds are formed in the... View Article
Why Are Bryophytes Limited In Size?
Bryophytes are small as they are restricted in size due to poor transportation means for gases, water and other nutrients.... View Article
How Do Mosses Transport Water And Nutrients?
Mosses are primitive, small and non-vascular structures in which the conductive tissues are absent in most of them which is... View Article
What Are Scales In Riccia?
Typically, Riccia inhabits shady places and damp areas and other similar terrestrial habitats. Scales are violet coloured, multicellular, and single-cell... View Article
What Produces Isogametes?
A form of sexual reproduction involving gametes having similar morphology (typically same in size and shape) is isogamy. These female... View Article
What Is A Haplontic Life Cycle? Give An Example.
Zygotes are diploid cells in the complete cycle. The process of mitosis only takes place in the haploid phase. The... View Article
How Are The Gametophytes Of Vascular Plants In Comparison With The Gametophytes Of The Bryophytes?
(a) smaller but to have larger sex organs (b) smaller and to have smaller sex organs (c) larger and to... View Article
How Do Cycas And Adiantum Resemble Each Other?
(a) motile sperms (b) seeds (c) vessels (d) cambium Answer: (a) motile sperms Explanation – Adiantum is a pteridophyte while... View Article
In Which Of These, Syngamy Can Occur Outside The Body Of The Organism?
(a) fungi (b) ferns (c) algae (d) mosses Answer: (c) algae Explanation – The process of permanent and complete fusion... View Article
In Which Of The Following, Isogamous Condition With Non Flagellated Gametes Are Found?
(a) Fucus (b) Chlamydomonas (c) Volvox (d) Spirogyra Answer: (d) Spirogyra Explanation – Spirogyra comprise isogamous gametes (similar in size),... View Article
Which Of The Following Is Responsible For Peat Formation?
(a) Riccia (b) Sphagnum (c) Funaria (d) Marchantia Answer: (b) Sphagnum Explanation – Sphagnum is also known as peat moss... View Article
In Which Of The Following, Male Gametes Are Flagellated?
(a) Ectocarpus (b) Anabaena (c) Spirogyra (d) Polysiphonia Answer: (a) Ectocarpus Explanation – Gametes produced by Ectocarpus are biflagellated. In... View Article
In Which Of The Following, Gametophyte Is Not Independent Free Living?
(a) Marchantia (b) Funaria (c) Pinus (d) Pteris Answer: (c) Pinus Explanation – The existence of male and female gametophytes... View Article
What Is Required For Transportation Of Male Gametes In Bryophytes And Pteridophytes?
(a) wind (b) insects (c) birds (d) water Answer: (d) water Explanation – The sperms of both bryophytes and pteridophytes... View Article
How Are Conifers Adapted To Tolerate Extreme Environmental Conditions?
(a) thick cuticle (b) presence of vessels (c) broad hardy leaves (d) superficial stomata Answer: (a) thick cuticle Explanation –... View Article
Which Of The Following Is A Mismatch?
(a) Salvinia – Heterosporous (b) Pinus – Dioecious (c) Cycas – Dioecious (d) Equisetum – Homosporous Answer: (b) Pinus –... View Article
What Is Avena Coleoptile Test?
The Avena coleoptile test is a bioassay for examining the activity of auxin-type growth regulators. It was set up by... View Article
Where Are Cytokinins Produced?
Cytokinins are phytohormones that promote cytokinesis, cell division in plant shoots and roots. They participate in cell differentiation and growth... View Article
What Is The Chemical Name Of Auxin?
The chemical name of auxin is indole-3-acetic acid (IAA). The term ‘auxin’ was derived from ‘auxein’, the Greek word which... View Article
