Given a scientific passage and an answer, generate a question for the given answer.

Passage: The pioneer species is soon replaced by other populations. Abiotic factors such as soil quality, water, and climate will determine the species that continue the process of succession. Mosses and grasses will be able to grow in the newly created soil. During early succession, plant species like grasses that grow and reproduce quickly will take over the landscape. Over time, these plants improve the soil and a few shrubs can begin to grow. Slowly, the shrubs are replaced by small trees. Small trees then are succeeded by larger trees. Since trees are more successful at competing for resources than shrubs and grasses, a forest may be the end result of primary succession. Answer: primary succession
What's the term for the gradual progression from simple plants to larger more complex ones in an area?

Passage: The Gaia hypothesis states that the biosphere is its own living organism. Answer: the gaia hypothesis
What hypothesis states that the biosphere is its own living organism

Passage: Carolus (Carl) Linnaeus (1707-1778) ( Figure below ) built on Aristotle's work to create his own classification system. He invented the way we name organisms today, with each organism having a two word name. Linnaeus is considered the inventor of modern taxonomy , the science of naming and grouping organisms. Answer: taxonomy
What is the name of the science that is concerned with naming and grouping organisms?