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“All cells, whether they are normal or cancerous, need energy. Cel division actually requires more energy than many other cell activities. Imagine that each cell in your sample needs two units of energy to divide.”

a) compare the amount of energy used by cells in each sample at 90 days.

b) how might this energy requirement affect an individual who has a cancerous tumour?

answer: - b cells

explanation: -

there are many types of white blood cells present in our body. one such class of white blood cells are the lymphocytes. the b cells belong to the lymphocyte class of wbcs. the b cells perform their action against the pathogen by producing specialised proteins called as antibodies. these antibodies are produced as and when the b cells encounter pathogens in response to the antigens present on the surface of the pathogen. these antibodies bind to the antigens present on the pathogen and then, target them for destruction by other cells of the immune system.

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.

Lacking something of the ozone layer

Other organisms can change their behavior to take the place of the plants in the ecosystem.