Which body system dose the immune system rely on to provide the first line of defense against pathogenes?
a) integumentary system
b) nervous system
c) circulitory system
d) endocrine system

Sort the examples by the type of diversity that they exhibit a park has 80 species of trees red, yellow, and orange bell peppers are all members of the same species individuals of the same lizard species have different mating strategies. five different bird species are at a bird feeder. genetic diversity species diversity

Eutrophication caused by human nutrient pollution.

How do the evolutionary chart and the video support the claim that all living things are made up of cells?