How are meiosis and mitosis different? a. meiosis produces 4 cells, but mitosis produces 2 cells b. mitosis produces haploid cells, and meiosis produces diploid cells c. chromatids are formed only during the process of meiosis d. mitosis has an anaphase i and ii, but meiosis only has anaphase i

Ineed to get this test done which of the following statements is correct in hour our immune system responds to a potential pathogen? a.) the skin will be the first line of defense, and then the many phagocytes in the bloodstream will attempt to consume the possible pathogen. b.) b cells will start reading the antigen code immediately and call t cells to assist in destroying the pathogen. c.) the adapted immune system will call on the innate immune system to destroy the pathogen. d.) the t-cells in the adapted immune systems are the first to recognize the pathogen

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

Which of the following must be true for a fossil organism to be useful as an index fossil? a. the fossil organism must be widespread geographically. b. the fossil organism must be abundant. c. the fossil organism must be limited to a short span of geologic time. d. all of the above.