what is the role of light in eggs' hatch-ability?
445742
improvise. Instead of  a hen sitting on it, we use light to hatch the egg
1088170
Depends on how many yolks there are.\nSome eggs have two and then it is \n"are yellow". If there is only one yolk\nthen it is "is yellow".\n\nIs the joke on us?
66251
Can eggs withstand a greater force from one direction than from others? \n\nWhich battery lasts the longest?- How can power be increased?\n\nHow is paint affected by temperature changes?- Elasticity of rubber; effect of glue.\n\nHow much heat is required to raise the temperature of various substances by an equal amount? \n\nWater levels- study and record varying levels over the year in a body of water; account for differences and the results on the surrounding environment.  \nHumidity- can you collect the amounts of water in the air at different temperatures?  \n\nEveryday activities that illustrate chemical principles  \n\nGrowing crystals- factors that affect the rate and the size  \n\nCan you obtain water from ink, vinegar, milk?  \n\nThe preferred pH level in the soil for various plants
551674
Short Answer: no need to develop pigments.  \n\nThe explanation: sunlight is harmful (ergo you use sunscreen) because of UV light, and pigments are produced by our skin cells to absorb the force brought on by UV rays, keeping your DNA from absorbing them.  If you're not exposed to sunlight, your skin doesn't need to produce and therefore doesn't produce much pigmentation, if any.  Same happens in animals.  If their permanent condition is as such, they eventually lose all ability to produce pigments simply because they can invest the energy on something that will give them the advantage to survive in their environment.  \n\nAs for blindness, you need light in order to see, and just like we can't see in total darkness, fish can't see in darkness either.  So, animals that live in absolutely dark environments don't need sight, and thus don't have it.  They'd rather spend the energy needed to develop sight (which is useless) in developing other sensory organs that will give them an advantage as hunter, to avoid being something else's lunch or both.\n\nMulti colouration in animals exists for many reasons, the two main ones are \n\n1- as disguise to fool prey (to eat) or to fool predators (to not be eaten)\n\n2- as an attractive feature for sexual selection, so that potential mates identify them clearly and select them for mating.  \n\nIn any case, competition to be the best hunter, the best hiding or the one that attracts more females or males drives selection and thus evolution.  \n\nRemember: if you get eaten, die of starvation or don't reproduce, you don't get to pass on your genes.  As such, any special traits you might have do not get passed on in the gene pool and those traits dissapear with your dead rotting self.  If more humans knew this, we'd be a little more appreciative of our uniqueness (read: selfish) and suicide rate would go way down.  \n\nThat's what evolution is all about, survive until you get laid and knock someone up or to get someone to knock you up.
5440
This is actually very easy to answer, based on evolution the egg had to come first. Evolution works like this: There are slight changes in the genetic information of the sex cells (i.e. eggs and sperm) of individuals that are passed on to the offspring of any two parents. These changes in the genetic makeup are called mutations. Mutations can either have: 1) A deleterious effect on the offspring (genetic disorders may arise, many times these are lethal); 2) sometimes these mutations may be advantageous, making an individual more fit than its neighbors (this is sometimes referred to as conferring an advantage); or 3) these mutations can have no effect, making no change from parent to progeny.\n\nIn the case of the chicken, it must have evolved from something else that became less fit than the chicken and eventually becoming extinct. The chicken became a chicken from this other organism through mutations that built up over time in subsequent generations. However, whatever the genetic makeup that finally became defined as a chicken, that individual was first conceived and developed in an egg before being hatched. The egg and sperm that fused to produce the chicken didn't bypass the period of gestation within an egg that had developed in the bird family millions of years before the chicken came along.\n\nSo the simple answer to this question is the egg came first -- unless you believe in fairy tales?
955142
Egg, larva, pupa and adult.
1169418
The eggs were already in the product. The eggs lie dormant until the environment is right, and then they hatch.
1091509
The short answer to your question is: chemicals.\n\nSome insects glow all over, and some only in certain places. Some glow all the time, and some only in bursts or flashes. In any event, the glowing is caused by the oxidation of luciferin by luciferase. In English, a specific chemical (called "luciferin" by early physiologists because it could "ignite," so to speak, to make light... "lucifer," get it?) is chemically changed ("oxidized;" electrons are removed from it resulting in its acquiring a positive charge) by a special enzyme ("luciferase;" an enzyme is a special kind of protein that speeds up chemical reactions). Chemical reactions can be of two basic types, one kind requires energy, and the other kind gives off energy. This luciferase-luciferin reaction is of the "energy-giving-off" variety. By "energy given off" scientists mean to say that some form of energy can be detected. The are more than a few forms of energy: heat is probably the most common kind of energy given off by a chemical reaction, but light (radiant energy) is also seen in many reactions. Incidentally, the luciferase-luciferin reaction also gives of heat energy, but it is negligible (98% of the energy is given off as light). \n\nIn lightning bugs, this reaction occurs in special cells on the ventral side (belly) of the posterior (rear end) abdomen (last segment of the insect). The special cells are probably derived from fat cells, and are sandwiched between a reflective layer of cells inside and a transparent cuticle ("skin," sort of) outside. These cells are under the control of the nervous system, which will supply the additional materials necessary to the cells to effect the chemical reaction, stuff like the enzyme itself, oxygen, blood, adrenaline and other compounds. Without some kind of control, the organs would flash all the time or simply stay lit, but you've probably noticed that fireflies only flash at night, dusk being the most popular time.
631159
The eyespot helps the organism find sunglight to power photosythesis and the chloroplast allows the organism to carry out photosthesis when light is available. \nThey work together because the eyespot finds sunlight which allows the cholorplast to allow the organism to carry out photosythesis. \nHope this helps!
639418
Light pushes electrons outs of the atoms in the cell making electricity
64857
richard is right.\n\nTo boys4ever: How can you have a creature without an egg to hatch it?  Unless, of course, you are suggesting that some chicken like creature gave live birth to the first chicken!
753904
Quintuplets were in the womb and then they were born, and it was bright and sunny ?! =P  LOL i dunno, just trying to be original
985817
yes- the eggs are not always visible
275006
Let us tackle this question logically first and then scientifically.\nLOGICAL ANSWER:- All living cells in plants as well as animals are provided with a selectively permeable membrane.( also called semi permeable membrane). A chicken egg is basically a cell. For that matter all bird eggs are cells. (Notwithstanding their large or exceptionally large size, recollect here an Ostrich’s egg.). Therefore it is provided with a selectively permeable membrane.\nSCIENTIFIC ANSWER:- The semi permeable membrane is required to control the entry of different \nMetabolites in to the developing egg as long as it is in the hen’s body. \n During the period of incubation, it controls the exchange of gases that gain entry through the porous, outer calcium carbonate shell.\nWHERE TO FIND IT?:- This thin and white and semitransparent membrane is located just in side the shell surrounding the white albumen of the egg.. In a hard boiled egg it is found clinging to the solid white of the egg.
662376
Many terrestrial invertebrates react to light by moving away from it. This behaviour is intended to protect them from the heat of the sun which would dry them out and kill them.\nIn Science lessons the usual animals used to demonstrate this are Blowfly larvae (maggots) and woodlice.\nThe presence of eyes is not necessary, but some sort of photoreceptor is.
306074
The one you mentioned is a good one. What about eggs grown under heat and eggs grown in a blanket and which one hatches. I won the science fair with this one. It's very original.
997749
The eggs hatch in about 60 days