An immune response to a specific antigen generates the production of which type of cell that launches an attack the next time that same antigen infects the body?

a. effector cells

b. memory cells

c. t cells

d. antibodies

3x-y-3z if x=-2, y=1, and z=-2

What is a nucleic acid?

What do tuberculosis, HIV, and malaria all have in common? Group of answer choices A. They all can be spread through body fluids, such as blood B. They all respond to antibiotics. C. They are all spread by parasites. D.

Once a human is infected with a virus, bacterium, fungus, or parasite, how do these organisms cause disease? A. They only affect the human's future offspring. B. They interfere with the human's normal body functions. C.

Which series shows levels of organization in order from the smallest to the largest structure? atom, molecule, cell, organism molecule, atom, cell, organism cell, molecule, atom, organism cell, atom, molecule, organism

Clover will flower if exposed to 8 hours of dark and 16 hours of light. It will not flower if exposed to 16 hours of dark and 8 hours of light. However, if the 16 hours of dark is interrupted with a brief period of light the clover will flower.

This disaster results from an abnormal rise of water generated by a storm, over and above the predicted astronomical tides.

A student observes poor growth of plants in a garden containing high clay content. Clay content reduces drainage in soil. Which of these is the best method to improve plant growth in the garden?

Jelaskan bukti bahwa senyawa memiliki sifat berbeda dengan atom penyusunnya?

Why is a symptomless STI just as dangerous as an STI that exhibits symptoms? Explain your answer.