Lymphocytes are a component of which type of defense mechanism

Lymphocytes or natural killer is one of the component of innate immune system where it acts as defense mechanism of the body that are always present to mobilize and fight bacteria, viruses and microbes at the site of infection.

Moreover, innate immune system also refers to non-specific recognition of certain molecular shapes on pathogens. Other components of innate immune system includes physical epithelial barriers, phagocytic leukocytes, dendritic cells, and circulating plasma proteins.

they float because they are less dense than the water itself

something denser than water, like a rock, will sink to the bottom

hey bro i looked it up on google the structure of the eye-spot in euglena viridie, e. ehrenbergii, and phacus pyriyorme is not as franzé haa described it. the so-called “crystal body” and “lens bodies” were not found in any of the individuals of the species examined by me. as earlier observers have stated, the eye-spot consists simply of a mass of pigment granules arranged in a single layer, and probably embedded in a protoplasmic framework, but the latter could not be seen, and its presence was only inferred from the fact that the pigment granules must be held together in some way, thd the eye-spot as a whole is capable of expansion, and that the pigment granules can be separated from each other.

hope this   and an i get brainlsiest