Which takes place during the second trimester of pregnancy? a. first movements are felt by the mother
b. cerebral hemispheres begin to form
c. fetus makes urine
d. joints and bones form

Which element provides strength to the exoskeleton of clams and oysters

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.

Rotenone is an insecticide that is toxic