Environmental factors carn have various effects on ecosystems. In August 2005, Hurricane Katrina caused signifcant damage in several states along the Gulf Coast, including Alabama, Mississippi, and Louisiana. Thousands of people were evacuated from their homes due to flooding and other damage caused by the storm. What environmental impact would Hurricane Katrina not have caused? Oearly onset of spring change in marine ecosystems Ochange in animal migration change in habitats

Which is an advantage of having memory cells when a pathogen is encountered for a second time. a) the memory cells are what proliferate into clones of cells in response to the binding of an antigen. b) memory cells are vital to the primary immune response in that they immediately recognize pathogens even at the first encounter. c) memory cells are essentially effector cells that are short lived and attack antigens even without having a receptor specific to that antigen. d) it ensures that more lymphocytes with a receptor specific to a particular antigen will be present than in a host that had never encountered that pathogen.

What substance is the most acidic. lemon juice. tomato juice. sodium hydroxide. water

If the charge that enters each meter of the axon gets distributed uniformly along it. true or false