The First line of defense in the immune system A( block pathogens from entering block
B( KIll infected cells
C( Send signals to increase immune cell formation
D( kill the pathogen

In which of the following relationships is one organism always benefited while the other organism is always harmed

Describe your dna model. which part do the straws represent? the pushpins? the paper clips and the black dots you made with the marker?

The table presents the average day and night temperatures in five cities. it also reveals whether a city receives substantial rainfall (wet climate) or little rainfall (dry climate). which city’s rocks are likeliest to experience frost wedging, and why? a) city a because the consistently subzero temperature would prevent water from melting b) city b because it is a wet region and the temperature fluctuates around the freezing point c) city c because it receives plenty of rain fall and the weather is moderately cool d) city d because the hot and dry weather would cause rocks to absorb water