What are antibodies physical barriers non specfic defense mechanisms spacific defense mechanisms

2. sketch the inside of the bean nodule, and describe or label what you observed with the hand lens.

Which statement describes characteristics of planarians? a they live in oceans, are parasites, and reproduce only sexually. b they live in fresh water, are parasites, and reproduce only asexually. c they live in oceans, are free living, and reproduce sexually and asexually. d they live in fresh water, are free living, and reproduce sexually and asexually.

All phases of matter may have a fixed mass