A group of students measures the mass and volume of an object to calculate its density. Which procedure increases the accuracy and validity of the group’s data? repeating the experiment with different measurement devices and analyzing all the data having group members individually measure and calculate the density with the same measurement devices changing the procedure to check whether the results are constant varying the equipment used to check whether the results are constant

the best answer is, earth strong )

explanation:

answer; 60-100; beats per minute

"menstrual cycle is a complex cycle that consists of several processes. order of occurrence of steps in menstrual cycle are as follows:

1. high progesterone levels maintain the endometrium lining of the uterus.

2. endometrium lining breaks down and low levels of estrogen stimulate the pituitary to release fsh and lh.

3. fsh and lh stimulates the follicles to develop and the oocyte to produce estrogen.

4. rising estrogen levels suppress fsh production and development of other follicles.

5. a spike in lh causes follicle to rupture.

6. a breakdown of corpus luteum causes progesterone level to drop."