1) There are three clusters of leaves
2) the longest leaf measures x cm
3) the shortest leaf measures y cm
4) the plant weighs Z grams
5) the widest leaf measures w cm
Once a signaling molecule binds to a cell receptor of another cell , the signaling process complete? In most cases the answer is no, not at all! Cell signaling can be divided into three stages : signal perception , chain relay signal within the cell and cellular response .<span>
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DRIs is the general term for a set of reference values or guidelines that are used to plan and asses nutrient intakes of healthy people. These values which vary by age and gender include:
- Recommended Dietary allowance (RDA): average daily level of intake sufficient to meet nutrient requirements of about 97 - 98% of healthy people.
-Adequate intake (AI): established when evidence is not sufficient to develop an RDA and is set at a level assumed to ensure nutritional adequacy.
- Tolerable Upper Intake (UL): Maximum daily intake unlikely to cause adverse health effects.
DRIs are not necessarily found on labels because there is no law requiring that they must be placed there.
I believe that the answers are physical and chemical barriers.
