Answer:
Replicates can be used to measure variation in the experiment so that statistical tests can be applied to evaluate differences. Averaging across replicates increases the precision of gene expression measurements and allows smaller changes to be detected.
Explanation:
Answe<u>r:</u>
<u>light caused the elodea plants to photosynthesize, releasing O2 gas</u>
Explanation:
Oxygen is a by-product of photosynthesis. In presence of light, water molecules are split into hydrogen atoms and oxygen gas. The elodea plant is photosynthetic in nature. Later, the hydrogen atoms combine with carbon dioxide to form simple sugars like glucose in the dark stage.
At the beginning of the follicular phase, the lining of the uterus (endometrium) is thick with fluids and nutrients designed to nourish an embryo. If no egg has been fertilized, estrogen and progesterone levels are low. As a result, the top layers of the endometrium are shed, and menstrual bleeding occurs.