MCQs Biology-30 Posted on December 10, 2025December 10, 2025Author agropublishers 0 Table of Contents Toggle MCQs Biology-30Multiple Choice QuestionsMCQs Biology-30 MCQs Biology-30 Multiple Choice Questions 1. Which factor is primarily responsible for the large-scale distribution of plants on Earth? Herbivory Soil pH Climate Seed size 2. Which group of bacteria requires a low-oxygen environment (typically 2-10%) for optimum growth and is inhibited by higher atmospheric oxygen concentration (â21%)? Anaerobic bacteria Microaerophilic bacteria Aerobic bacteria Facultative bacteria 3. Evolutionary history of plants affects their distribution because___________ Plant species adapt to specific ecological niches over time Evolution eliminates climatic influence All plants can survive in any climate Soil is uniform worldwide 4. Sucrose is a ———— Polysaccharide Disaccharide Monosaccharide Lipid 5. Considering their trophic mode, fungi are classified as ___________? Completely parasitic Photoautotrophs Chemoautotrophs Absorptive heterotrophs 6. In the stomach, mucus serves primarily to ———– Activate pepsin Neutralize acid Enhance protein digestion Protect the mucosa from self-digestion 7. Tapeworms and Plasmodium are examples of __________ organisms Completely parasitic Chemosynthetic Photosynthetic Absorptive heterotrophs 8. Plant dispersal limitation occurs when _______ Abundant water, causing seed rot Soil pH is too low for germination Seeds are unable to reach suitable habitats due to geographical barriers Temperature is optimal for growth 9. Trypsin is secreted by which organ? Liver Stomach Salivary glands Pancreas 10. Chitin is an example of ———– Polysaccharide Disaccharide Lipid Monosaccharide Loading … Question 1 of 10 MCQs Biology-30