The evolution of sexual reproduction is a great puzzle in modern evolutionary biology. Many groups of eukaryotic organisms, especially most animals and plants, reproduce sexually. The evolution of sex between two organisms of the same species contains two related but different themes: its origin and its maintenance. However, since hypotheses for the origin of sex are difficult to test experimentally, most of the current work has focused on the maintenance of sexual reproduction. Biologists, including W. D. Hamilton, Alexei Kondrashov, and George C. Williams, have proposed various explanations for how sexual reproduction is maintained in a large set of different living things.
Answer: variation, reproduction, and heritability.
Explanation: Genetic variation is an important force in evolution as it allows natural selection to increase or decrease frequency of alleles already in the population. Genetic variation is advantageous to a population because it enables some individuals to adapt to the environment while maintaining the survival of the population.
All species must reproduce to survive. Organisms cannot live forever, so they must reproduce to allow their species to continue to live on. Reproduction is nature's way of allowing a species to survive.
Higher heritability means the trait evolves faster; fewer generations are required for the trait to increase to the same degree as a trait with lower heritability. For this reason, genetic correlation and heritability show how a trait might change from one generation to the next and into the future.
Your missing some function/description.
Answer/Explanation:
Cytoplasm: [H] Jelly-like substance within the plasma membrane
Lysosome: [E] Sac filled with digestive chemicals
Mitochondria: [F] Structures that converts nutrients to energy
Centriole: [A} Structure that organizes motion of chromosomes
Endoplasmic reticulum: [G] passageways where chemicals are made
Vacuole: Sacs that store water, nutrients, or waste products
Cell membrane: [D] Membrane that surrounds and protects the cell
Nucleus: [J] Structure that contain DNA and regulates genes
Cytoskeleton: framework of protein fibers that guides organelle movement in the cell and help shapes the cell
Ribosome:[I] Structures that manufactures ribosomes
Nuclear membrane: [C] Membrane that protects the Nucleus
Golgi apparatus: [B] Stack of membranes that packages chemicals
Vesicle: [K] Package created by Golgi appaaratus
Nucleolus:[L] Small structure that synthesizes proteins
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