Answer:The phosphorus cycle matters because phosphorus is an essential nutrient for sustaining life on Earth, where it plays a central role in the transfer of energy within organisms, the structure of the genetic material, and in the composition of cell membranes, bones and teeth.
Explanation:
Answer:
D) Can simple organic molecules form spontaneously in an oxygen-free atmosphere?
Explanation:
Crop yield<span> is the measurement often used for a cereal, grain or legume and is normally measured in metric tons per hectare (or kilograms per hectare). </span>Crop yield<span>can also refer to the actual seed generation from the plant. For example, a grain of wheat yielding three new grains of wheat would have a </span>crop yield<span> of 1:3. And you left out the graph</span>
The menstrual cycle is complex and controlled by many different glands and the hormones that these glands produce.
The four(4) phases of the menstrual cycle are:
(1) menstruation.
(2) the follicular phase.
(3) ovulation .
(4)the luteal phase.
Common menstrual problems include heavy or painful periods and premenstrual syndrome (PMS).
