Questions tagged [eggs]

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2 votes
0 answers
34 views

How does a turtle develop inside its egg?

This is related to Cause of premature death in turtle eggs, for those interested. I have noticed that Kinosternon spp. eggs have three layers: hard outer shell white opaque membrane (like the one you ...
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5 votes
1 answer
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Cause of premature death in turtle eggs

Context I am a hobbyist turtle breeder and I have been keeping and breeding turtles for 15 years (I have hatched turtles in the high hundredths). Long story short, few years back, my friend and I ...
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4 votes
1 answer
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Is the yolk of an egg a cell?

I am a little confused, I find sites on the internet that say that the yolk of an egg is a macrocell, and another says that it is not. So... is it a macrocell or not?
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6 votes
1 answer
462 views

What insect eggs are these?

There are only 3 eggs. A pink colour with stripes on it. Is it possible to identify the species? Found right below a window, on the wood. I'm in Bangalore, India.
3 votes
0 answers
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Do egg-whites dry as right-handed helices?

Do egg-whites dried at cool temperatures form mostly right-handed helices, and if so is there an explanation for this? Because there is so much (mostly crystal-related) research a quick search did not ...
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1 vote
0 answers
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What species left these underwater eggs?

While inspecting some plants planted about 1.5 ft underwater in my pond, I noticed what appeared to be eggs on many of the plants. Note that the eggs are the white, oblong, opaque things. The clear ...
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0 votes
1 answer
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Why are the shells of birds' eggs fragile but not those of other creatures?

In my limited understanding, eggs of oviparous creatures other than birds have a flexible outer membrane. Is there any obvious reason that bird eggs should have fragile shells? Notes I'm asking why ...
0 votes
1 answer
210 views

From what kind of insect might these eggs be

Does anybody know what kind of insect might have laid these eggs: The photo was taken a few days ago in Limburg, Belgium near a pasture with some goats.
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1 answer
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Calcium reabsorption from egg shell during embryogenesis, how is carbonate neutralized?

As the embryo reabsorbs calcium from the shell, it also reabsorbs an equal quantity of carbonate. Calcium is in quite high concentrations in the body, the same molarity for carbonate causes a very ...
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6 votes
1 answer
2k views

Why is egg white alkaline?

According to Tiefenbacher, Egg white is naturally alkaline with an initial pH of 7.6–7.9 but in storage the loss of carbon dioxide by diffusion through the shell increases the pH of the egg white up ...
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-3 votes
1 answer
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Can hand sanitizer kill a fertilized human egg cell?

If you took a human egg cell that was fertilized in vitro and sprayed some hand sanitizer on it would it die?
0 votes
1 answer
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How is in-vitro fertilization technically achieved?

I failed searching on Google technical details about how in-vitro fertilization is achieved. I'm referring to the toolset and its use, rather than the chemical or biological aspects of the process. I ...
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Egg mass on glass

mid-April, East Texas Can someone ID the egg mass deposited on our window? It's about the size of a fingerprint. I may have to try again with photo- thanks for forbearance Eggs are bright green, mass ...
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4 votes
1 answer
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What kind of hot pink eggs are these? [duplicate]

I saw a dozen or more clusters of what I think are insect eggs attached to a few vertical sticks protruding from a small pond, and a few more to stalks of grass nearby. Location is in Hsinchu County, ...
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0 answers
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Evolution of multicellular eggs

Which animals where the first in which ova were not simply released, but instead provided with some additional nutrition and/or protection in the form of a larger egg?
2 votes
0 answers
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What causes the shape of the dense structure in this "giant squid egg" sac?

The YouTube video Swimming Next To Giant Squid Egg shows a giant egg of a squid and/or an egg of a giant squid. Text in the video's description includes the text quoted below, which indicates that the ...
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1 vote
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DNA like marine animal or egg

What is the name of the marine egg or living being that is transparent like a jelly fish or a Venus girdle, with a shape like a DNA or better like a chain of infinites, long as half of a hand and ...
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4 votes
1 answer
4k views

What kind of insect eggs are these (found in Malaysia)?

What kind of eggs are these? Found outside on a window, when I removed them via scraping, whitish oozy fluid came out. I've seen this before but they've been appearing more frequently, always appear ...
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1 vote
0 answers
5k views

Why some eggs are bile stained?

Why eggs of some helminths( Diphyllobothrium latum, Trichuris trichiura, Ascaris lumbricoides etc) are stained with bile while eggs of other helminths( Hymenolepis nana, Enterobius vermicularis etc.) ...
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9 votes
1 answer
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Can someone identify these eggs?

They were attached to a tree in a black-water inundated forest (igapó) near Manaus, Amazonas, Brazil. The photo was taken in mid June, the water level was already high, and the eggs were about one ...
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2 votes
0 answers
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Effects of X-ray exposure on upcoming pregnancies

Recently we had a little fight with my girlfriend about the risks of genetic diseases for our potential baby. The thing is that she had her medical check recently and it included an X-ray examination ...
5 votes
1 answer
6k views

Is it possible to be allergic to the yolk of an egg but not the egg white?

At lunch one day, my friend had a hard boiled Easter egg. When he pealed it he squeezed the yolk, or yellow part, of the egg out. I asked him what on earth he was doing and he said, "I'm allergic to ...
3 votes
2 answers
862 views

Exact meaning of the term "clutch"

When reading a Wikipedia article to do with chickens, I have come across the term "clutch", but I was not able to entirely figure out what this word means. I was wondering whether the term clutch can ...
4 votes
1 answer
62 views

Can I breed the most productive hen by hatching eggs from the most productive ones?

Here is some hypothetical input: I have a set of eggs. I hatch these eggs and get chicken from them. Say, 100 hen that can lay eggs. I have a hypothetical technology to track some parameters of each ...
14 votes
1 answer
343 views

What are these (eggs?) ? ( Location - India )

The picture can be zoomed in on clicking Description: There are 24 of them, each ovoid, 1mm long and attached to the switch's frame by suction cups connected by tubes. They are secured to the base ...
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1 vote
0 answers
347 views

How can a coldblooded animal make an egg hatch?

I have chickens at home, and yesterday while removing the eggs I felt that they were quite warm. This seems to make sense, because the chicken has been brooding on it in order to make it hatch. ...
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13 votes
1 answer
2k views

Are these spider eggs?

I was pulling weeds in my backyard in Southern California, when I saw a spider over a white area on the underside of one of the leaves. It's staying right near the white spot. Are those spider eggs? ...
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1 vote
1 answer
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Can a chicken really be hatched outside of the egg?

This YouTube video (screenshots attached) claims to show Japanese schoolchildren breaking an egg into a kind of clingfilm "hammock in a cup", and then growing and hatching a chick from it in an ...
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1 vote
1 answer
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Stem cell research and female egg synthesis

In terms of years, how far is stem cell research from being able to produce a female human egg from other female body cells?
1 vote
1 answer
3k views

Is it possible to grow a fertilized human egg entirely outside the woman's womb?

Many science-fiction movies (for example, The Island) show the possibility of growing a fertilized human egg cell (from the beginning to the end) outside the womb of the woman. This means that you ...
1 vote
1 answer
85 views

What's the rationale behind freezing one's eggs if cells can be cloned?

It seems to me there's a lot of discussions around the topic of somebody freezing her eggs. What I don't understand though are the following: Why would you freeze your eggs when you know that the ...
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5 votes
1 answer
2k views

Why do chickens continuously lay unfertilized eggs?

As per subject: why do chickens continuously lay eggs even if they are not fertilized? Is this sort of behaviour found in other species of birds (or other egg-laying animals), or only in chickens? Is ...
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2 votes
3 answers
1k views

Is an egg classified based on the species inside it, or by the species that laid it?

Basically what I'm asking is if an animal of species x were to lay an egg, and the animal inside that egg happened to be the first member of a genetically new ...
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3 votes
1 answer
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Would some dinosaur egg be the most massive cell that ever existed? Are dinosaur egg relatively small compared to eggs of modern birds? [duplicate]

The egg of a large modern bird is a very large cell, not the largest possible biological cell since there are very long nerves in squid, but it's likely the most massive modern cell. But, what ...
3 votes
1 answer
643 views

How does the embryo inside a shelled egg get oxygen?

If I'm not mistaken a typical animal in the womb will get oxygen via the umbilical cord from the mother. Thus allowing it to "breathe" in a liquid environment. I thought maybe shells are permeable and ...
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1 vote
1 answer
657 views

How long do human egg cell grow up?

I read article about alcohol harm where written that child may bear with birth defect cause mother used to drink alcohol 10 years ago so egg cell stay damages that long. I don't believe that human ...
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1 vote
1 answer
1k views

Can a rotten egg actually hatches to a real life?

First of all, I'm no expert in biology. I failed a lot in high school. Please bear with it if it's a stupid question. For the past few days, I got a rotten smell as if an animal died in my kitchen. I ...
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4 votes
2 answers
523 views

Why are there no marine birds?

Walking by the lake and watching the ducks the other day a thought struck me; there are lots of aquatic birds but all remain at least somewhat terrestrial, nesting on land. Why is it that no birds ...
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2 votes
1 answer
1k views

Why are hard boiled eggs so homogeneous?

A eukaryotic animal cell is a complicated piece of biological machinery. Some major structures inside of the cell (see the image below) include: the nucleus, mitochondria, Golgi vesicles, and various ...
3 votes
1 answer
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how can a pseudo coelomate like ascaris lay 200k eggs in a single day

as per this site the dimensions of eggs of ascaris lumbricoides are 78-105 microns and as it is shown in the pic down here only half of the body cavity would be used for storage of all the stages of ...
4 votes
1 answer
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How can Taenia solium (tapeworm) lay 35,000 eggs per proglottid?

As far as I know TAENIA SOLIUM is an acoelomate which basically means that the space between the alimentary canal and the gut is completely filled [or] occupied by the mesoderm and they do not have ...
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2 votes
1 answer
534 views

Is a double-yolk egg capable of producing two viable chicks?

As per title: If fertilized, is a double-yolk egg capable of producing two viable chicks (that could survive to adulthood)? Have there been any reported cases of such (presumably) fraternal twins?
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8 votes
1 answer
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Have there been any theories put forward as to the reasons behind Temperature-Dependant Sex Determination in reptiles?

This applies to most if not all reptiles, but I'll write about leopard geckos since that's what I know. Incubation temperature of the eggs makes a big difference in the development of the gecko. ...
7 votes
1 answer
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Do birds have navels?

This picture shows the development inside a bird egg: This shows the connection of the embryo to the yolk sac. Does this mean birds have navels? And if so, what happens to the umbilical cord once ...
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0 votes
1 answer
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In what circumstances does a mammalian egg copy its DNA?

In the 2nd episode of the new Cosmos series, the host Neil deGrasse Tyson shows how the white-furred bear could have evolved (reasonable scientific speculation, of course). If you haven't seen that ...
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Is nutrient absorption different in Hypersensitive I patients?

I am thinking how the nutrient absorption differs between between patients with allergies (Hypersensitivity I) and those not. The current guideline about number of eggs in diet is one daily ...