Examlex
Which of the following refers to the oxygenated zone of a lake?
Cytoplasm
The gel-like substance inside a cell, excluding the nucleus, containing organelles and involved in multiple cell functions.
Penetration
The process of entering or piercing through a substance, structure, or barrier.
Escape Hypothesis
A theory suggesting that some cellular organelles, such as mitochondria and chloroplasts, originated from bacteria that once entered a host cell and lived symbiotically.
Regressive Hypothesis
A theory suggesting that more complex systems or structures have evolved from simpler precursors through a process of simplification or loss of features.
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