Pick the statement about phloem cells that is accurate throughout. Select one: Group of answer choices Phloem cells are alive at functional maturity because active processes and a plasma membrane are required to generate and maintain sugar gradients. Phloem cells are alive at functional maturity because only a living cell can generate the negative pressure required to move water/sap long distances. Phloem cells are alive at functional maturity because moving water from an area of low water potential to an area of high water potential requires an input of energy. Phloem cells are alive at functional maturity because if they were dead their cell walls would degrade.

quizlet 109-exam-2-flash-cards/

characterization of nanoparticles is a critical step in nanomaterial production as it provides information of dimension, morphology, surface charge, distribution and degree of surface functionalization.

"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."