Q: The simplest system is that of contractile vacuoles present in what? Read this paragraph and choose the correct option from the provided answers: 41.3 Excretion Systems Many systems have evolved for excreting wastes that are simpler than the kidney and urinary systems of vertebrate animals. The simplest system is that of contractile vacuoles present in microorganisms. Flame cells and nephridia in worms perform excretory functions and maintain osmotic balance. Some insects have evolved Malpighian tubules to excrete wastes and maintain osmotic balance. Choices: - parasites - macroorganisms - crystals - microorganisms A:
microorganisms

Q: Plant cells have cell walls that are made of what? Read this paragraph and choose the correct option from the provided answers: Plants are multicellular eukaryotes that are placed in the Plant Kingdom . Plant cells have cell walls that are made of cellulose. Plant cells also have chloroplasts. They allow plants to make food by photosynthesis. In addition, plants have specialized reproductive organs that produce gametes. Male reproductive organs produce sperm. Female reproductive organs produce eggs. Male and female reproductive organs may be on the same plant or on different plants. Choices: - carbonate - nucleus - tissue - cellulose A:
cellulose

Q: Which kingdom are mosses and trees included in? Read this paragraph and choose the correct option from the provided answers: Mateusz Kulawik. Mosses and trees are all part of the plant kingdom . CC BY 2.0. Choices: - protista - fungus - gymnosperm - plant A:
plant

Q: What continuously monitors and repairs its genetic material? Read this paragraph and choose the correct option from the provided answers: Choices: - ova - nucleolus - proteins - cells A:
cells