What does a circle mean on a pedigree?

Multicellular organisms use cell division, mitosis, for growth and the maintenance and repair of cells and tissues. single-celled organisms may use cell division as their method of reproduction. regardless of the reason for mitosis, the process ensures genetic continuity. what is the step in the cell cycle that ensure genetic continuity?

Describe your dna model. which part do the straws represent? the pushpins? the paper clips and the black dots you made with the marker?

What do complement proteins do? a- they heal tissue. b-they cause fever c-they signal phagocytes d-they transport hormones