Question

Did lettuce seed germination respond in a predictable way® Describe the trend AND mention any concentration that did not fit the trend 2. According to this activity and the Background reading, how could acid rain affect specifically impact food supplies

Answer 1

Answer:

Answer

Explanation:

1)Yes, In good growing conditions, lettuce seed will germinate within two to 12 days, depending on variety. Loose-head varieties may sprout more quickly than heading types, but all seeds depend on similar soil, moisture and light conditions to support germination. Growers vary in their estimate of the percentage of lettuce seeds that will germinate per packet, but you can expect 75 to 80 percent of seeds packed for the current growing season to sprout. Rates decline each year, and a packet of lettuce seeds is usually viable for three years.

The germination of lettuce seed (Lactuca sativa) is inhibited at certain temperatures, above the optimum. These temperatures may not prevent growth, however, of seeds which have already started to germinate. This inhibition seems to be largely a varietal characteristic, for the temperature at which one variety will germinate satisfactorily may completely inhibit the germination of another variety. Furthermore, it usually requires a higher temperature to inhibit the germination of old seed than it does that of freshly harvested seed of the same variety. By freshly harvested seed is meant that which is not more than five weeks old. In the case of most varieties, almost complete failure of the seed to germinate occurs at 30° C, regardless of age, although there are a few varieties that germinate fairly well at this temperature.