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 121 - 140 of 168
121. The retention of female gametophytes on the parent sporophytes and the development of zygotes into young embryos within them in heterosporous pteridophytes is considered a precursor to:
122. The term 'gymnosperms' means 'naked seeds' because:
123. Which gymnosperm is known as one of the tallest tree species?
124. In *Cycas*, small specialized roots called __________ are associated with N2-fixing cyanobacteria.
125. The male gametophytic generation in gymnosperms, which is highly reduced and confined to a limited number of cells, is called a:
126. Unlike bryophytes and pteridophytes, the male and female gametophytes in gymnosperms:
127. In angiosperms, the seeds are enclosed in:
128. Which is the smallest angiosperm mentioned in the source?
129. In sponges, cells are arranged as loose cell aggregates, exhibiting which level of organization?
130. Which phyla exhibit an organ system level of organization?
131. An incomplete digestive system, found in Platyhelminthes, is characterized by:
132. In which type of circulatory system is the blood pumped out of the heart, and the cells and tissues are directly bathed in it?
133. Which of the following animals exhibit radial symmetry?
134. Animals in which the body can be divided into identical left and right halves in only one plane exhibit:
135. Animals like coelenterates, where cells are arranged in two embryonic layers (external ectoderm and internal endoderm) with an undifferentiated mesoglea in between, are called:
136. Triploblastic animals possess a third germinal layer called __________ between the ectoderm and endoderm.
137. An animal with a body cavity not lined by mesoderm, where the mesoderm is present as scattered pouches between ectoderm and endoderm, is called a:
138. Which of the following animal phyla are considered coelomates?
139. The rod-like structure formed on the dorsal side during embryonic development in some animals, derived mesodermally, is called the:
140. Which phylum consists of primitive multicellular animals with a cellular level of organization and a characteristic water transport or canal system?