Air, water and warmth must be present for germination to take place.
In order for germination of a seed to take place the seed must be viable. Sufficient food must be available for the seed to grow. Water, air, oxygen and appropriate temperature must also be available for the seedâ??s growth.
pressure gradient
Oxygen. It must be present along with fuel and heat for combustion or burning. It combines with elemental iron (Fe) to form iron oxide or rust. Oxygen and moisture are necessary for the germination of seeds.
everything
poo on bread
water vapour/ cold /and a condensation medium
Germination: Bermudagrass has very good seedling vigor. Under ideal conditions, germination begins within 7 to 10 days. Soil moisture must be maintained during the germination period. Allow 14 to 18 days after the first seedlings emerge for complete germination.
Seed germination and seed deterioration can both be affected by microorganisms. Microorganisms can break down the hard outer seed coating. When this happens, the seed must find the right conditions to germinate. If it does not, then the seed will deteriorate and rot.
It varies somewhat, but seeds generally need a warm moist substrate. So if you sprinkle some radish seeds onto a moist paper towel, put it into a ziplock, and keep it in a warm place, germination is likely to occur. Other seeds have different requirement though-- some seeds need to be partially digested by a bird or mammal before they can sprout. Weird huh?
All of the transistors must be biased in their operating range to work correctly.
There are three conditions that must be present to show causality: 1) there must be a strong correlation between the proposed cause and effect, 2) the proposed cause must precede the effect in time, and 3) the cause has to be present whenever the effect occurs (Burns & Grove, 2001, p. 791).
Zinc chloride and an acid must be present, preferably HCl