Answer and Explanation:
Most young roots have two main regions. An outer cortex and a central cylinder containing the vascular bundles.
The endodermis also referred to as starch sheath. Its cells have a casparian strip which is made up of an impervious waxy deposit on the radial and cross walls. It controls entry of water and dissolved salts into the vascular bundle.
Answer:
Male and female gametophytes
Answer:
ocean productivity largely refers to the production of organic matter by "phytoplankton"plants suspended in the ocean most which are single - celled
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