They are biodegradable and non biodegradable <span />
Ans.
Animals are multicellular, eukaryotic organisms that belong to domain eukarya. They have cells with membrane-bound cell organelles, such as mitochondria, endoplasmic reticulum, nucleus, Golgi body, and lysosomes. In these organisms, genetic material is present inside the nucleus (known as true nucleus), which is surrounded by double-membrane system.
Thus, the correct options are:
-They contain a nucleus.
-They are eukaryotic.
-They contain membrane-bound organelles.
Memory cells do not require b cell receptors. This statement is False.
- Memory B cells may recognize an antigen and produce a particular antibody response because they have B cell receptors (BCRs) on their cell membrane that are identical to those on their parent cells.
- A B-lymphocyte subtype known as a memory B cell (MBC) is a component of the adaptive immune system. Within the germinal centers of the secondary lymphoid organs, these cells grow.
- Memory B cells can remain dormant in the blood stream for years at a time.
- Their purpose is to memorize the properties of the antigen that initially activated their parent B cell, so that when the memory B cell comes into contact with that antigen in the future.
- It will cause an expedited and potent secondary immune response. B cell receptors are found on memory B cells (BCRs)
learn more about Memory cells here: brainly.com/question/15196473
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Our global climate and weather on Earth can all be attributed to the ocean. The ocean can absorb large quantities of heat from the Sun, and then distribute it to the land next to it, or transport the heat farther away.
