In which phase of mitosis do chromosomes become visible and the nucleolus disappears? 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:
In the biogeochemical carbon cycle, carbon dioxide (CO2) is removed from the atmosphere primarily by autotrophs (plants, algae) through the process of photosynthesis, where it is fixed into organic compounds (glucose). Carbon is returned to the atmosphere through respiration (by plants and animals), decomposition of dead organic matter, and combustion of fossil fuels.

Explanation:
Sedimentary rocks, such as limestone, shale, and sandstone, form in layers from accumulated sediments and preserve remains of organisms as fossils. Igneous rocks from volcanic activity and metamorphic rocks formed under high temperature/pressure rarely contain fossils. The fossil record provides evidence for evolution, showing gradual changes in species over geological time. Fossils include bones, shells, imprints, and amber inclusions.