Bacterial cells that encounter conditions that are not favorable to survival will sometimes form a tough, protective shell containing the nucleic acid and a small amount of cytoplasm. this shell can survive harsh conditions in a kind of dormancy that may last for months or years. what is the name given to this tough, protective shell? a) vacuole b) carapace c) cell wall d) endospore eli

endospore

Explanation: bacteria produce endospore when the conditions are unfavourable.the endospore is a tough structure which is made up of DNA, ribosomes and dipochilinic acid.this tough structure is able to withstand conditions ,such as extreme heat,driedness and UV radiation.when the conditions becomes favourable again,the endospore turns back to it's original form

answer: - b cells

explanation: -

so, the b cells mediate their action by identifying the antigens present on the surface of the pathogens and then producing antibodies in return to mediate its effect.