An antigen . a) is a protein molecule that helps defend the body against disease
b) is a foreign molecule that evokes a specific response by a lymphocyte
c) induces development of white blood cells in the bone marrow
d) is a protein attacked by an invading microorganism
e) could be an invading bacterium

Zoe decided to measure the hand length of each of her classmates. first she marked a line across each student's wrist and lined up a ruler from this mark to the top of the middle finger to measure the length. then she recorded the measurements in the table below. marla did this the same way for each classmate, and then zoe used this ruler to measure each straight line and record the data below. this data is invalid. what is the most likely reason why it is invalid? the ruler is marked in centimeters, but zoe recorded data in inches. the range of lengths is too wide, so zoe must have misread the ruler. marla’s complicated measuring procedure was overly confusing. marla could have been inconsistent while drawing outlines of fingers.

What maintain homeostasis when a persons internal body temperature is 97.5°f

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