16

16 chromosomes

Since the onion (Allium cepa) is a diploid organism having a haploid genome size of 15.9 Gb, it has 4.9x as much DNA as does a human genome (3.2 Gb). Other species in the genus Allium vary hugely in DNA content without changing their ploidy.

Onions can reproduce both sexually and asexually. Sexual reproduction is through seeds, while asexual reproduction (or vegetative propagation) is the multiplication of vegetative parts to grow new onions.

Growers plant onion bulbs or seedling transplants in late summer with distinct male (male fertile) and female (male sterile) onion lines in the same field. Generally, the field ratio is one row of males for every three female rows and they’re tough to tell apart from a distance, but males produce pollen.

Multiplying onions, sometimes called bunching onions or “potato” onions, grow on a pretty simple principle: You plant one bulb, and as it grows, it divides into a clump of several more bulbs. Whether you opt to let them do this or continue to propagate from bulbs is a matter of personal preference.

Onions reproduce either with seeds or by bulbils (little bulbs) that form from lateral buds. [6] After the first growing season, mature bulbs can be left in the ground or dug up and replanted. Either way the plant will undergo a period of dormancy, then grow during the next growing season.

Onions (Allium cepa) are biennials, that produce bulbs their first year. Onion bulbs store the nutrients that the onion flowers need for the producing seeds. When onions grow stems and flowers, it is known as bolting. When this happens, the stems produce seeds for onion reproduction.

Onion plants can be grown from seeds or from bulbs. The process of growing onions from bulb is known as vegetative propagation (a form of asexual reproduction in which the new plant grows from a fragment of the parent plant). Bulb grows by the growth of the radicle and flag leaves after which the true leaves emerge.

Potatoes reproduce asexually with tubers, which are thick or swollen plant parts that serve as a food reserve. Ginger reproduces through rhizomes, which grow underground and are actually the stem of a plant.

Because potatoes and tomatoes have similar flowers and pollination, potatoes are self-pollinated, which means they have the male and female flowers on one plant.

Asexual reproduction, or cloning, involves the starfish dividing itself into two or more parts, after which the new parts regenerate.

Starfish reproduce sexually by spawning. Spawning means that the sex cells are released into the water. When starfish spawn, the males release sperm and the females release eggs in great numbers. Female starfish may release millions of tiny eggs into the water during a spawning session.

Most adult starfish of other species do reproduce via a separate male and female. Females usually produce eggs that males fertilize in the seawater. At that point, the fertilized eggs develop and grow before becoming little starfish that will attach themselves to the substrate and start the whole process over again.

In most species, the buoyant eggs and sperm are simply released into the water (free spawning) and the resulting embryos and larvae live as part of the plankton. In others, the eggs may be stuck to the undersides of rocks.

Do starfish bite? No, starfish don’t bite. They have no teeth and are not dangerous to humans. These small sea creatures are not exactly known for their voracious appetite and won’t harm you.

“Because starfish can’t breathe out of water, they suffocate in a matter of minutes. Others perish as a result of the stress of handling or from coming into contact with perfume, sunscreen, or other chemicals on human skin.

Katie Campbell: Starfish lack a centralized brain, but they do have a complex nervous system and they can feel pain.

Yes, you can eat a Starfish, and many times in China’s food markets, you will find them being served on a stick. Not too many people eat them because to some, their taste is not appealing. It has been said that they taste like a Sea Urchin but a bit more bitter and creamier.

Yes, it’s OK to pick up a starfish, but you must take adequate care and prevention so that you don’t hurt them or don’t get yourself stung by a venomous one. It is never suggested that you pick one because if you bring them to the open-air they will die within 3 to 5 minutes due to intoxication.

Neurobiologists have long recognized that fish have nervous systems that comprehend and respond to pain. Fish, like “higher vertebrates,” have neurotransmitters such as endorphins that relieve suffering—the only reason for their nervous systems to produce these painkillers is to alleviate pain.

“Since fishes lack the parts of the brain that set us apart from the fishes — the cerebral cortex — I doubt very much that fishes engage in anything like crying,” Webster told LiveScience. “And certainly they produce no tears, since their eyes are constantly bathed in a watery medium.”

Most fish do use air to inflate and deflate their bladder to maintain buoyancy which is expelled either through their mouth or gills which can be mistaken for a fart. Point being – No farts.

In captivity, it’s strongly recommended that they should be kept at least in pairs, to provide companionship. If you watch fish in a tank, you’ll see that they regularly engage with other fish. It’s thought that solitary fish, much like solitary humans, may begin to suffer from depression and lethargy.

No, fish do not get “sad” if another fish dies. Fish do have a brain that is capable of some type of “emotion” but not to the extent that humans feel. They don’t feel anything like sadness, but may feel something to a smaller extent. Scientists have been able to train fish.

Of course, different species of fish will have different abilities, as well as different levels of vision. In most cases though, yes, fish are able to recognize their owners and in some cases form an attachment. The fish will come over to their recognized owner who often offers a food treat or reward.

A correctly set up, properly stocked and well maintained aquarium doesn’t need to be “cruel”. The animals can live quite a good life with easy access to food and no predator pressure. Even territorial conflicts are usually avoided, because you don’t want your animals to die, do you? No, not in and of themselves.

Definitely Yes, fish get sad when the tank they are living in is of a small size. Their sadness can convert into severe depression and ultimately shock as well.