Answer:
Superantigens produce intense immune responses by stimulating lymphocytes to produce cytokines.
Explanation:
Superantigens are a group of bifunctional proteins that interact with at least two receptors expressed on different cells. The superantigen´s receptors in lymphocyte T is located in the same place where the lymphocyte interacts with a conventional antigen, RCT. The capability of these superantigens to join their receptors in many T cells, shoots a series of processes that conduce to cellular activation, differentiation, proliferation, and great production and release of cytokine.
Superantigens constitute the most potent natural immunostimulators known.
Ans.
Fungi are eukaryotic (both unicellular and multicellular), heterotropic organisms that depend on plants, animals, or organic dead matter for food. Fungi reproduce either sexually or asexually.
-Mating types show molecular mechanisms to regulate compatibility in sexual reproduction in fungi. The organisms of class basidiomycota, such as club fungi, have bipolar mating system, means they have both positive and negative mating strand. The option 1). correctly matches with D). club fungi.
-The fruiting bodies of fungi are defined as the specialized structures that produce spores. In sac fungi, fruiting bodies are formed sexual reproduction that fills thousands of asci or spores in it. The option 2). correctly matches with C). sac fungi.
-The chytrids show one of the early lineages of fungi. They possess a cell wall of chitin, a flagellum, absorptive structures for nutrition. The option 3). correctly matches with A). chytrids.
- The common molds include various microscopic fungal species, which grow in the form of hyphae (multicellular filamentous structures). They are found nearly everywhere and show all forms of nutrition. They feed from dead organic matter, plants, and animals (as using them hosts). The option 4). correctly matches with B). common molds.
I think it's label B..I'm not 100% sure though.
A male lizard will do this to attract a mate.
