Which of the following is a connecting link between Annelida and Arthropoda? MCQ with Answer and Explanation

Explanation:
Carbohydrates are the body's primary and most efficient source of energy, broken down into glucose to fuel cellular activities and physical exertion. Proteins are essential macronutrients composed of amino acids, crucial for the growth, maintenance, and repair of body tissues, as well as forming enzymes, hormones, and antibodies. Fats are essential macronutrients; they provide concentrated energy, are vital for cell membrane structure, aid in the absorption of fat-soluble vitamins, and provide essential fatty acids. They should not be entirely avoided. Thus, statements 1 and 2 are correct.

Explanation:
Totipotency is the genetic ability of a single plant cell to divide and differentiate into all the cell types of the plant, ultimately generating an entire new plant. This property is the fundamental basis of plant tissue culture. Micropropagation is the technique used to rapidly multiply plants using this totipotency, often through the formation of callus and somatic embryos.

Explanation:
Pollination is the mechanism of transferring pollen grains from the anther to the stigma of a flower. After fertilization, the ovule develops into a seed and the ovary into a fruit. Double fertilization, involving syngamy and triple fusion, is a unique characteristic of angiosperms, not gymnosperms. Therefore, statements 1 and 3 are correct.