An e. coli culture that has been growing at 37°c is moved to 25°c. which of the following changes must be made in its plasma membrane? a. the viscosity must increase. b. the number of saturated chains must increase. c. the number of phosphate groups must increase. d. the number of unsaturated chains must increase. e. no changes are necessary.

the plasma membrane are cell membrane wouldn't really be effected while 37 degrees Celsius is the most optimal temperature for an E.coli culture it shouldn't/wouldn't die at 25 degrees Celsius.

so I believe no changes are necessary.

mammal

explanation:

"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."