Maharashtra Board Class 12 Biology 2023 Exam

<p>7 to 7.5</p> Signup and view all the answers

<p>Biodiversity</p> Signup and view all the answers

<p>Parrot, Bat, Fowl</p> Signup and view all the answers

<p>Cl- diffuse into RBCs</p> Signup and view all the answers

<p>Calcitonin and Thymosin</p> Signup and view all the answers

<p>Water potential of pure water is negative</p> Signup and view all the answers

<p>LNG-20</p> Signup and view all the answers

<p>Cervical cancer</p> Signup and view all the answers

<p>Electrostatic precipitator</p> Signup and view all the answers

<p>Mule</p> Signup and view all the answers

<p>Flavr Savr tomato</p> Signup and view all the answers

<p>Cretinism</p> Signup and view all the answers

<p>Exponential growth phase</p> Signup and view all the answers

<p>Abscission</p> Signup and view all the answers

<p>Chlorosis</p> Signup and view all the answers

<p>Onion</p> Signup and view all the answers

<p>a) Gross primary productivity, b) Net primary productivity</p> Signup and view all the answers

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<p>ABA inhibits stomatal opening, thus decreasing water loss through transpiration. It also promotes the closure of stomata in response to water stress. These actions help plants conserve water during periods of drought or stress.</p> Signup and view all the answers

<p>Chlorophyllase breaks down chlorophyll, the green pigment in plants, into colorless compounds. This breakdown is responsible for the yellowing of banana fruits that occurs during ripening. It is a key enzyme in the process of ripening, and it is also responsible for the characteristic changes in color and flavor that occur as bananas mature.</p> Signup and view all the answers

<p>Anemia, Anti-asthma drugs (e.g., interferon), Cystic fibrosis, Protease inhibitors</p> Signup and view all the answers

<p>Imbibition is the process of absorption of water by solid, hydrophilic materials like seeds and wood. It occurs due to the attraction between water molecules and the molecules of the solid material.</p> Signup and view all the answers

<p>Imbibition in root hairs helps in the adsorption of water as it creates a negative pressure that draws water into the root. This occurs due to the hydrophilic properties of the root hair cell wall, which attracts water molecules and causes swelling. The swelling of the root hair cells increases their surface area and creates a gradient, allowing water to be drawn into the root hair.</p> Signup and view all the answers

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<p>Heterochromatin stains darkly, is tightly packed, and is inactive, while euchromatin stains lightly, is loosely packed, and is active in transcription.</p> Signup and view all the answers

<p>Decomposers, Plants, Carnivores, Omnivores</p> Signup and view all the answers

<p>Biofortification is the process of increasing the nutritional value of crops by breeding them to contain more nutrients. This is a sustainable and cost-effective way to address malnutrition and improve public health.</p> Signup and view all the answers

<ol> <li>Amino acid content - Fortified cereals with lysine (e.g., wheat, rice); Vitamin C content - Fortified orange juice.</li> </ol> Signup and view all the answers

<ol> <li>The X-chromosome is larger and has a longer non-homologous region than the Y-chromosome. The Y-chromosome is smaller and has a shorter non-homologous region than the X-chromosome.</li> <li>The X-chromosome is submetacentric, meaning that the centromere is located near the center of the chromosome. The Y-chromosome is acrocentric, meaning that the centromere is located near one end of the chromosome.</li> </ol> Signup and view all the answers