The meaning of eukaryote

Eukaryotic cells have membrane-bound organelles (“little organs”). The cell’s nucleus for example is an organelle. Organelles are scattered throughout the cell’s cytoplasm.

All organisms, expect bacteria, are made up of eukaryotic cells. Protozoa, algae, fungi, higher plants and animals are eukaryotic. The nuclear material does not mix with the cytoplasm.

Nucleus serves two important functions. First, it keeps the cell’s genetic material – its DNA – safe and sound. Isolated in its own compartment, the cell’s DNA stays separated from the bustling activity of the cytoplasm and from metabolic processes that might damage it.

Eukaryotic cells are larger and more complex than prokaryotic cells. In addition to a nucleus, these and most other eukaryotic cells contain an endomembrane system (ER, vesicles, and Golgi bodies), mitochondria, and a cytoskeleton, which is a dynamic “skeleton” of proteins. They perform specific cellular functions, for example, respiration and photosynthesis.
The meaning of eukaryote

What is parasitism?

Parasites are organisms that live in or on another living organism existing at the host organism’s expense, each individual parasite completing all or a major part of its life cycle in or on one individual of the host.

Parasitism can be defined as:
*Adapted to the physiochemical conditions of the host
*Utilized host nutrients in a manner compatible with host survival
*Minimizes the host immune response
*Has a life cycle synchronous with that of the host

The key features of parasitism are a close association and dependence on the host for food.

True parasitism is where the parasites live at the expense of their hosts and always have the potential to harm them, either directly, by depriving them of essential material or by destroying tissues, or indirectly, by damaging their hosts by the liberation of toxins.

Parasites are faces with dichotomous choice for infecting a new host. They can remain in place until a new host arrives or they can disperse.
What is parasitism?