biology mcqs
An extensive multiple-choice question test covering the diversity of the living world, biological classification systems, and detailed characteristics of the five kingdoms (Monera, Protista, Fungi, Plantae, and Animalia) including viruses, viroids, prions, and lichens, designed for competitive exam preparation.
Showing questions 101 - 120 of 168
101. Algae contribute significantly to Earth's atmosphere by carrying out at least half of the total:
102. Which marine algae produce the hydrocolloids algin and carrageen, used commercially?
103. Agar, a commercial product obtained from *Gelidium* and *Gracilaria*, is used to:
104. *Chlorella*, a unicellular alga, is rich in proteins and used as a food supplement by:
105. Green algae (Chlorophyceae) are usually grass green due to the dominance of which pigments?
106. Storage bodies in green algae, located in the chloroplasts, which contain protein besides starch, are called:
107. The colour variation in brown algae (Phaeophyceae) from olive green to various shades of brown depends upon the amount of which xanthophyll pigment?
108. In brown algae, food is stored as complex carbohydrates, which may be in the form of:
109. The plant body of a brown alga is usually attached to the substratum by a __________, has a stalk called the __________, and a leaf-like photosynthetic organ called the __________.
110. The red colour of Rhodophyceae (red algae) is due to the predominance of which pigment?
111. The food stored in red algae (Rhodophyceae) is floridean starch, which is very similar in structure to:
112. Bryophytes are often called 'amphibians of the plant kingdom' because:
113. The main plant body of a bryophyte is:
114. The male sex organ in bryophytes is called __________, producing biflagellate __________.
115. *Sphagnum*, a moss, provides peat which has been used as fuel and as packing material for trans-shipment of living material due to its capacity to:
116. Asexual reproduction in liverworts (e.g., *Marchantia*) takes place by fragmentation or by the formation of specialized green, multicellular, asexual buds called:
117. Pteridophytes are evolutionarily significant as they are the first terrestrial plants to possess:
118. In pteridophytes, the dominant phase in the life cycle is the:
119. The small leaves in pteridophyta, as seen in *Selaginella*, are called:
120. Which of the following pteridophytes are heterosporous, producing two kinds of spores (macro and micro spores)?