Nucleosomes and histones can have “tags” that affect whether the DNA wound around them is “turned on” or “turned off”. Look up information on one of those tags and describe how it affects DNA gene expression

In which case would a scientist choose to use a dissecting microscope rather than a compound microscope

Which statement about the immune system is false? a. lymphocytes reduce inflammation, b. b cells remember specific pathogens. c. most white blood cells kill bacteria d. white blood cells are made in lymph nodes.

The body of water found at number 4 on the map above is the