Questions with Answers on “Adaptations in Plants for Survival in Extreme Conditions”
1. What are the key adaptations of desert plants to conserve water? Answer:Desert plants have evolved several key adaptations to conserve water in the harsh, dry environment. One of the primary adaptations is the development of thick, waxy cuticles on their leaves, stems, and roots, which reduces water loss through transpiration. Additionally, many desert plants have small or modified leaves,...
MCQs on “Adaptations in Plants for Survival in Extreme Conditions”
1. Which of the following is an adaptation of desert plants to conserve water? a) Large leavesb) Thick cuticlec) Bright flowersd) Shallow roots Answer: b) Thick cuticle 2. Which structure in desert plants helps reduce water loss? a) Large stomatab) Small, waxy leavesc) Broad leavesd) Flowers with high water content Answer: b) Small, waxy leaves 3. Why do some desert plants have deep roots? a) To...
Nitrogen Fixation in Plants: Biological Importance and Mechanisms
Introduction Nitrogen is one of the most essential elements required for the growth and development of plants. It is a critical component of amino acids, proteins, enzymes, and chlorophyll. Despite its abundance in the atmosphere (about 78% of the air we breathe is nitrogen), plants cannot directly utilize atmospheric nitrogen due to its inert nature. To overcome this, plants rely...
Questions with Answers on “Nitrogen Fixation in Plants: Biological Importance”
Nitrogen Fixation in Plants: Biological Importance 1. What is nitrogen fixation, and why is it biologically important for plants? Answer:Nitrogen fixation is the process of converting atmospheric nitrogen (N₂) into ammonia (NH₃), which plants can assimilate. Importance: Nitrogen is a vital nutrient for plants, required for the synthesis of amino acids, proteins, nucleic acids, and chlorophyll. Atmospheric nitrogen is unavailable directly to most plants....
MCQs on Nitrogen Fixation in Plants: Biological Importance
1. What is nitrogen fixation? A. Conversion of nitrogen gas into ammoniaB. Conversion of ammonia into nitratesC. Conversion of nitrates into nitrogen gasD. Conversion of ammonia into proteinsAnswer: A 2. Which enzyme is primarily responsible for nitrogen fixation? A. RubiscoB. NitrogenaseC. AmylaseD. ProteaseAnswer: B 3. Nitrogen fixation is mostly carried out by: A. AnimalsB. PlantsC. BacteriaD. FungiAnswer: C 4. Which of the following bacteria is...
Unlocking Life: Comprehensive Study on Seed Germination – Stages and Factors
Introduction Seed germination is a pivotal biological process marking the transition of a dormant seed into a growing plant. This process signifies the beginning of a plant’s life cycle, involving intricate physiological and biochemical changes. Understanding seed germination is essential in agriculture, horticulture, and ecological conservation, as it underpins crop production and biodiversity. What is Seed Germination? Seed germination is the activation...
Questions and Answers on “Seed Germination: Stages and Factors”
1. Define seed germination and explain its significance. Answer:Seed germination is the process by which a dormant seed begins to grow and develop into a new plant under favorable environmental conditions. The seed absorbs water, activates metabolic processes, and the embryonic plant inside begins to grow. Germination is significant because it is the initial step in a plant's life cycle,...
MCQs on Seed Germination: Stages and Factors
Which of the following is the first stage of seed germination?a) Leaf formationb) Water absorptionc) Photosynthesisd) Root developmentAnswer: b) Water absorption The process of seed germination begins with which physiological activity?a) Enzyme activationb) Nutrient storagec) Dormancyd) RespirationAnswer: a) Enzyme activation Which part of the seed emerges first during germination?a) Shootb) Cotyledonc) Radicled) HypocotylAnswer: c) Radicle Which factor is NOT essential for seed...
The Miracle of Plant Life: Reproduction in Angiosperms – Pollination and Fertilization
Introduction Angiosperms, or flowering plants, represent one of the most diverse and widespread groups of plants on Earth. Their success is largely attributed to their highly evolved mechanisms of reproduction. Central to their reproductive strategy are the processes of pollination and fertilization, which ensure genetic diversity and the continuation of plant species. This study material delves into the intricate details...
Questions with Answers on “Reproduction in Angiosperms: Pollination and Fertilization”
1. Explain the process of pollination in angiosperms and its types. Answer:Pollination is the transfer of pollen grains from the anther to the stigma of a flower. It can be of two types: Self-pollination (Autogamy): Transfer of pollen occurs within the same flower or another flower on the same plant. Types include: Cleistogamy: Pollination within closed flowers. Chasmogamy: Pollination in open flowers. Cross-pollination (Xenogamy):...
