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Answer:
Glands made up of parenchyma of glandular epithelium that forms the secretory portions of the glands.
Glandular epithelium is a modified form of columnar epithelium. Their cells are modified to secrete certain substances. It lines the stomach, intestine and other secretory organs.
The glands occur singularly as unicellular glands. Unicellular glands are the goblet cells in the mucous membrane of the alimentary canal.
It may occur congregate to form multicellular glands which includes sweat glands and sebaceous glands in the skin, mammary glands and salivary glands, etc.
Glandular epithelium secretes sweat, milk, digestive enzymes, oil and other hormones.
There are two types of glands: exocrine and endocrine glands. Exocrine glands can be unicellular or multicellular. They have ducts and secretion is delivered into these ducts and end up on the epithelial surface. For example: sweat glands.
Endocrine glands are without ducts and secretions are released directly to the bloodstream. Example: pineal gland, pituitary gland.
Note:
Glandular epithelium are the specialised epithelial cells that secrete glands. They are of two types: endocrine and exocrine glands. Exocrine glands hold secretion for covering and lining of the body until secretion is needed. Endocrine glands control hormone production and enclose the formed hormones until they are needed in the body.
The answer is A ,........
Answer:
It is destroyed
Explanation:
<em>The lytic cycle of the viral life cycle is characterized by the destruction of the host's DNA. The infecting phage gains entrance into the host's cell synthesizes proteins that break down the host's DNA, and then utilizes its own DNA as the cellular DNA.</em>
From there on, the phage takes over the cell's genetic mechanisms and utilizes it in the synthesis of the necessary proteins to manufacture new infecting structures.
Whale shark reproduction can be by laying eggs that is also called oviparity where the female deposits eggs in the algae or rocks. The embryos formed inside the eggs and feed on the yolk. They can also reproduce through viviparity which means by giving birth just like mammals wherein they are born fully formed. This reproduction process is through the placental link to the eggs wherein the yolk sac grows within a placenta that is connected to the wall of the uterus and gives the offspring the nutrients vital for their growth. Another reproduction process is through Ovoviviparity where eggs are formed inside the mother where the eggs hatch within the oviduct of the female and the young feed on the egg yolk of the yolk sac and the fluids that the walls of the oviduct secrete since the mother does not provide any food directly. Once the eggs are ready, eggs hatch inside the mother and it pups keep getting food from their surroundings until they are fully developed. The number of their offspring and the length of the gestation periods varies according to the species. Probably a female of some species may have only two offspring, but some other species may have between forty and eighty. The small sharks have shorter gestation period compared to large species that last from three to four months or up to more than two years. The large ones reproduce every two years, while the little ones have offspring each year. This is why the reproduction process of whale shark is not known in detail.
