Examlex
The F distribution is constructed as the ratio of two Student's t random variables;each divided by its degrees of freedom.
Pericycle
A layer of cells in plant roots that can give rise to lateral roots and is involved in secondary growth.
Endodermis
The innermost layer of cells in the cortex of a plant root, functioning as a selective barrier that regulates the passage of substances from the soil into the vascular system.
Stele
The central part of a root or stem containing the vascular tissue of xylem and phloem, responsible for the transport of water and nutrients.
Cortex
The outer layer of various organs and structures in the body, such as the brain and adrenal glands, or the primary layer of stems and roots in plants.
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