Answer: True because In biology, evolution is the change in the characteristics of a species over several generations and relies on the process of natural selection. The theory of evolution is based on the idea that all species? are related and gradually change over time.
Answer
The worm gets coated with antibodies, which activate other cells in the immune system to secrete chemicals that kill it.
Explanation:
Production of T-helper I cytokines like IFN gamma, IL-2 and IL-18 is highly protective against helminth infection by activating the macrophage intracellular killers. Protection against mucosal eosinophil responses in which antiparasitic chemicals are released. Killing also involves direct cytotoxic mechanisms in which T- cell and NK-cells directly release antiparasitic agents like perforin and granulysin which kill the parasite.
Answer:
The correct answer is option a, that is, cerebellum.
Explanation:
Alcohol acts as a CNS depressant. When more amount of alcohol is taken and the levels of alcohol rise within the body, some sections of the brain get influenced and a reduction in the functioning is witnessed in that particular part.
The region of the brain accountable for coordinating movement and also some kinds of learning seems to be sensitive specifically to the consumption of alcohol. Thus, cerebellum is the part of the brain, which gets most affected due to the consumption of alcohol. Therefore, test is performed to witness the balance of an individual, as cerebellum is the part of the brain responsible for appropriate posture and balance.
Answer:
When the meteor hit a caused a chain reaction which caused all that and made some cloud that was toxic.
Explanation:
