What element is missing from glucose molecules but must still be consumed by urchins when they eat the kelp in order to make their proteins? Carbon

Hydrogen

Nitrogen

Oxygen

i would have a lunch. it's one big package of food, making it one food. : p

the answer is 1. photosynthesis. glad to

"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."