A physical factor that influences an ecosystem is called an "abiotic factor."
Centipedes are carnivores, they use venom to kill their prey. They are preyed upon by birds, toads and shrews.
Any condition in an experiment that can be changed is a control variable!!
You control it!!
what are the answer choices
The right answer is a surface glycoprotein.
The antigens of the non-self correspond to any substance foreign to the organism, identified as such by the immune system of our organism which produces an energetic defense. Antigens are usually proteins (more specifically glycoproteins) contained in cells or foreign bodies (red blood cells transfused, organs transplanted, bacteria, viruses), or present in the environment (pollen, mite droppings, cat hair , etc.).
Our body has its own antigens that allow it to have a "specific identity card" and will be recognized as foreign by other organizations. They are called "self antigens".
