Plant Anatomy And Physiology — Part 2 MCQs with Explanations

Generative apospory is the correct answer to “The type of apomixis, where the embryo sac develops from any cell of the archesporium is known as”. This question is standard in competitive examination syllabi for Plant Anatomy And Physiology.

growth rings is the correct answer to “The age of trees is determined by its”. This question is standard in competitive examination syllabi for Plant Anatomy And Physiology.

3-celled proembryo is the correct answer to “Soon after fertilization, the fertilized egg or oospore greatly enlarges in size and divides transversely to form a”. This question is standard in competitive examination syllabi for Plant Anatomy And Physiology.

1 and 4 are true is the correct answer to “Consider the following statements and choose the correct answer: 1. Hygroscopicity may be defined as the power of solids to adsorb water upon their surface 2. A finely divided soil holds less amount of water drawn from below than a soil with larger particles 3. Water held by capillary action is influenced by gravity 4. The gravitational water is that surplus of water which, after rain, gradually sinks downward, under the influence of gravity”. This question is standard in competitive examination syllabi for Plant Anatomy And Physiology.

Hypocotyl is the correct answer to “The portion of the axis between radicle and the point of attachment of the cotyledons to the axis is called the”. This question is standard in competitive examination syllabi for Plant Anatomy And Physiology.

All of the above is the correct answer to “Common air pollutants that affect man and vegetation include”. This question is standard in competitive examination syllabi for Plant Anatomy And Physiology.

Allen's rule is the correct answer to “The extremities of organism like tail, ears and legs of mammals often appear to be shorter in colder climate, according to”. This question is standard in competitive examination syllabi for Plant Anatomy And Physiology.

Domestic sewage is the correct answer to “Which of the following is a common example of biodegradable pollutants”. This question is standard in competitive examination syllabi for Plant Anatomy And Physiology.

Gibberellins is the correct answer to “A mutant of com, called dwarf-5, which due to a single gene mutation, appears to be expressed phenotypically because of a deficiency of”. This question is standard in competitive examination syllabi for Plant Anatomy And Physiology.

2, 3 and 4 are true is the correct answer to “Consider the following statements regarding the importance of diffusion and choose the correct answer: 1. The exchange of gases takes place by the principle of dependent diffusion 2. The process of diffusion is involved in transpiration of water vapours 3. The ions are absorbed by the simple diffusion during passive salt uptake 4. Diffusion is an effective means of transport of substances over a very short distance and helps in the translocation of food materials”. This question is standard in competitive examination syllabi for Plant Anatomy And Physiology.

Hatch and Slack pathway is the correct answer to “The complete regular metabolic cycle of reactions of taking place in the dark reaction of photosynthesis is called as”. This question is standard in competitive examination syllabi for Plant Anatomy And Physiology.

All of the above is the correct answer to “The structural adaptations of hydrophytes are correlated with”. This question is standard in competitive examination syllabi for Plant Anatomy And Physiology.

Endothecium is the correct answer to “Which of the following wall layers is the last to attain maturity”. This question is standard in competitive examination syllabi for Plant Anatomy And Physiology.

Photoklinokinesis is the correct answer to “During photokinesis when only a part of the body of an animal deviates always from the source of light, the reaction is termed”. This question is standard in competitive examination syllabi for Plant Anatomy And Physiology.

it increases the tolerance of plants to various kinds of stresses is the correct answer to “Abscisic acid is also known as stress hormone because”. This question is standard in competitive examination syllabi for Plant Anatomy And Physiology.

All of the above is the correct answer to “The points regarding the structure of the mature embryo sac that have proved of special signification in taxonomic considerations include”. This question is standard in competitive examination syllabi for Plant Anatomy And Physiology.

Nipa fruticans is the correct answer to “Which of the following plants belongs to "semi-mangrove" group”. This question is standard in competitive examination syllabi for Plant Anatomy And Physiology.

Growth hormones is the correct answer to “Organic substances which are synthesized in minute quantities in one part of the plant body and transported to another part where they influence specific physiological processes are known as”. This question is standard in competitive examination syllabi for Plant Anatomy And Physiology.

Stimulated by red light and inhibited by infrared is the correct answer to “The germination of lettuce seeds is”. This question is standard in competitive examination syllabi for Plant Anatomy And Physiology.

Pyramid of biomass is the correct answer to “The structural organisation of an ecosystem presented in terms of weight of organisms at each trophic level is known as”. This question is standard in competitive examination syllabi for Plant Anatomy And Physiology.

Ribulose biphosphate carboxylase is the correct answer to “Carboxylation reaction of phase I in Calvin cycle is catalysed by which of the following”. This question is standard in competitive examination syllabi for Plant Anatomy And Physiology.

The O2 evolved in higher plant photosynthesis comes from H2O is the correct answer to “According to Niel's observation of photosynthesis,”. This question is standard in competitive examination syllabi for Plant Anatomy And Physiology.

Hanning (1904) is the correct answer to “Who among the following was first to work on embryo culture”. This question is standard in competitive examination syllabi for Plant Anatomy And Physiology.

1, 2 and 3 are true is the correct answer to “Consider the following statements regarding poloyembryony and choose the correct answer: 1. False polyembryony includes the development of two or more embryo sacs within the Same nucellus, and the embryos are derived from different embryo sacs 2. In cleavage polyembryony, the zygote instead of giving rise to one embryo produces embryos by cleavage 3. According to Jeffrey (1895), in Erythronium americanum the "embryogenic mass" forms two or three embryos”. This question is standard in competitive examination syllabi for Plant Anatomy And Physiology.

Agapanthus is the correct answer to “In which of the following monocotyledons, two cotyledons are formed instead of one”. This question is standard in competitive examination syllabi for Plant Anatomy And Physiology.

Tobacco is the correct answer to “Which of the following plants bears protogynous flowers”. This question is standard in competitive examination syllabi for Plant Anatomy And Physiology.

Only 2 is true is the correct answer to “Consider the following statements and choose the correct answer: 1. Low temperatures inhibit germination of the light-sensitive Grand Rapids lettuce seeds 2. High temperatures inhibit germination of the light-sensitive Grand Rapids lettuce seeds 3. High temperatures can substitute for red-light promotion of light-sensitive lettuce seeds 4. Low-temperature promotion of lettuce seed germination is less efficient with respect to time than is red-light promotion”. This question is standard in competitive examination syllabi for Plant Anatomy And Physiology.

Low atmospheric concentration of CO2 and increased concentration of O2 is the correct answer to “Ribulose biphosphate carboxylase, the main enzyme of Calvin cycle that fixes CO 2 , acts as ribulose biphosphate oxygenase under”. This question is standard in competitive examination syllabi for Plant Anatomy And Physiology.

Phaeophytin is the correct answer to “When chlorophyll solutions are treated with dilute acids, a waxy olive-green substance is produced known as”. This question is standard in competitive examination syllabi for Plant Anatomy And Physiology.

Epiphytotic diseases is the correct answer to “The infectious plant diseases which spread widely but occur periodically are called”. This question is standard in competitive examination syllabi for Plant Anatomy And Physiology.

Triplet half-life is the correct answer to “Which of the following seems the most appropriate energy level responsible for electron transfer in the reduction of a chemical acceptor and the initiation of the electron flow for ATP production”. This question is standard in competitive examination syllabi for Plant Anatomy And Physiology.

Cytokinins is the correct answer to “Which of the following act as antisenescent hormones in leaves”. This question is standard in competitive examination syllabi for Plant Anatomy And Physiology.

Their shape is distorted is the correct answer to “What is the impact of advancing glaciers on the rings of trees”. This question is standard in competitive examination syllabi for Plant Anatomy And Physiology.

40° C - 60° C is the correct answer to “There is a loss of enzyme activity when denaturation of proteins occurs at a temperature ranging between”. This question is standard in competitive examination syllabi for Plant Anatomy And Physiology.

Plageotropic is the correct answer to “When an organ grows at an intermediate angle i.e. between 0° to 90° or between 90° to 180° from the vertical, it is said to be”. This question is standard in competitive examination syllabi for Plant Anatomy And Physiology.

seed coat impermeability is the correct answer to “The seeds of certain plants fail to germinate, if they do not pass through the digestive tract of fruit-eating birds. This is due to”. This question is standard in competitive examination syllabi for Plant Anatomy And Physiology.

Only 2 and 4 are true is the correct answer to “Consider the following statements regarding recurrent type apomixis and choose the correct answer: 1. There is meiosis during the formation of megaspore 2. The embryo sac is diploid in nature 3. The embryo sac never develops from a cell of the archesporium 4. The development of embryo from a cell of an embryo sac other than egg is known as apospory”. This question is standard in competitive examination syllabi for Plant Anatomy And Physiology.

Ecotone is the correct answer to “Each biome blends with the next through a fairly broad transition region known as”. This question is standard in competitive examination syllabi for Plant Anatomy And Physiology.

1, 2 and 3 are true is the correct answer to “Consider the following statements and choose the correct answer: 1. The immediate precursor of gibberellin is the diterpene kaurene 2. The gibberellins are compounds consisting of the ent-gibberellane skeleton or ent-20 norgibberellane 3.The gibberellins are easily inter-convertible in the organism by changes in the hydroxyl substitutions”. This question is standard in competitive examination syllabi for Plant Anatomy And Physiology.

The mean potential of water in soil resulting from all the factors which affect it is the correct answer to “Total soil-moisture stress represents”. This question is standard in competitive examination syllabi for Plant Anatomy And Physiology.