PCR is a technique used to: MCQ with Answer and Explanation

Explanation:
The endosperm is a triploid tissue in angiosperm seeds that stores starch, proteins, and lipids to nourish the embryo during germination. It is formed by double fertilization. In some seeds (e.g., legumes) the endosperm is absorbed and the cotyledons become storage organs. The seed coat protects.

Explanation:
The cohesion-tension theory (transpiration pull) is the primary mechanism for water ascent in tall trees. Transpiration creates negative pressure (tension) in leaves, water molecules cohere, and the column is pulled up. Root pressure and capillary action play minor roles. The cohesion of water is due to hydrogen bonds.

Explanation:
Charles Darwin proposed the theory of evolution by natural selection, emphasizing that organisms with favorable variations are more likely to survive and reproduce. Hugo de Vries, a Dutch botanist, proposed the mutation theory of evolution based on his work on evening primrose, stating that evolution occurs through sudden, large mutations (saltations). Jean-Baptiste Lamarck proposed the theory of inheritance of acquired characters, based on the use and disuse of organs (e.g., giraffe's neck). All statements are correct.