Steroid hormones are cholesterol driven fat soluble molecule, produced by endocrine glands and organs and secreted into the blood to reach target cells.
Steroid hormones can pass through the cell membranes because steroid hormones are hydrophobic or fat soluble. Cell membranes are made up of a phospholipid bilayer that allows fat-soluble molecules to pass through it.
Steroid hormones enter through the cell membrane of the cell and bind with a specific receptor present in the cytoplasm. This receptor bound hormone later travels in the nucleus.
thousands of microbes including bacteria and phytoplankton are interacting to form the base of the food web of the entire ocean. algae are phytoplankton that takes in sunlight, nutrients, carbon dioxide, and water to produce oxygen and food for other organisms.