Question

1. what is the primary role of the mitochondria? a. packaging lipids. b. storing proteins. c. breaking down waste materials. d. generating atp through cellular respiration. 17. what is the primary purpose of meiosis in sexually - reproducing organisms? a. to produce haploid gametes with genetic diversity. b. to repair damaged tissues. c. to increase the size of an organism. d. to produce diploid cells identical to the parent cell. 18. what role do spindle fibers play in mitosis? a. they condense chromatin into chromosomes. b. they form the cell membrane. c. they regulate the movement of water into the cell. d. they pull sister chromatids apart to opposite poles of the cell.

Explanation:

1. Mitochondria are known as the power - houses of the cell and generate ATP through cellular respiration. Packaging lipids is mainly related to the endoplasmic reticulum and Golgi apparatus, storing proteins is not a primary mitochondrial function, and breaking down waste materials is more associated with lysosomes.
2. Meiosis in sexually reproducing organisms produces haploid gametes with genetic diversity through processes like crossing - over and independent assortment. Repairing damaged tissues is the role of mitosis in somatic cells, increasing organism size is also through mitosis, and producing diploid cells identical to the parent cell is mitosis.
3. Spindle fibers in mitosis pull sister chromatids apart to opposite poles of the cell, ensuring equal distribution of genetic material. Condensing chromatin into chromosomes is related to chromatin - remodeling proteins, forming the cell membrane is not their function, and regulating water movement into the cell is related to aquaporins.

Answer:

1. d. Generating ATP through cellular respiration
2. a. To produce haploid gametes with genetic diversity
3. d. They pull sister chromatids apart to opposite poles of the cell