What are two ways in which white blood cells fight pathogens that have entered the body ?

Which of the following lines of evidence would best support your assertion that a particular plant is an angiosperm? a) it produces seeds. b) it retains its fertilized egg within its archaegonium. c) it lacks gametangia. d) it undergoes alternation of generations.

What percentage of light hits earth's surface directly?

What process creates gametes? a.fertilization b.mitosis c.meiosis