Epithelial surfaces provide the first line of defense against infection by the use of several types of mechanisms. One of the chemical mechanisms used by epithelia is:

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.

How do chloroplasts set plants apart from other living things

Consider the venn diagram of plant reproduction. where in this image, areas a - d, would you insert the picture of the orange lily?