10 facts about earthworm
Answers
Answer:
Mark it as brainliest
Yes
Explanation:
They are largest species on earth
They are useful for farming.
They feed on small insects
Birds are the common predators of earthworm
They make tge soil fertile
They shiw crawling movement
They cme under the phylum of nonchordate - Arthropoda
Answer:
1)Earthworms come in a seemly infinite variety—around 6,000 species worldwide.
2) . Of the more than 180 earthworm species found in the U.S. and Canada, 60 are invasive species, brought over from the Old World, including the night crawler.
3) Lacking lungs or other specialized respiratory organs, earthworms breathe through their skin.
4) The skin exudes a lubricating fluid that makes moving through underground burrows easier and helps keep skin moist. One Australian species can shoot fluid as far as 12 inches through skin pores.
5) Each earthworm is both male and female, producing both eggs and sperm
6) Baby worms emerge from the eggs tiny but fully formed. They grow sex organs within the first two or three months of life and reach full size in about a year. They may live up to eight years, though one to two is more likely.
7) 7. Full size for an earthworm varies among species, ranging from less than half an inch long to nearly 10 feet. The latter monsters don't occur in U.S. backyards—you'll have to go to the Tropics to see one of them. The homegrown versions top out at around 14 inches.
8) The glaciers that crawled across Canada into the northern tier of the lower 48 states during the most recent ice age wiped out earthworms in those areas.
9) The earthworm's digestive system is a tube running straight from the mouth, located at the tip of the front end of the body, to the rear of the body, where digested material is passed to the outside. Species vary in what they eat, but by and large their devouring of fallen leaves and/or soil allows the worms to move nutrients such as potassium and nitrogen into the soil.
Also, worm movements within the Earth create burrows that encourage the passage of air and a loosening of the soil. Good things, right? Well, maybe not. Which brings us to 10 ...
10. The northern forest evolved after the glaciers retreated, yielding an ecosystem that does not benefit from earthworms. These forests require a deep layer of slowly decomposing leaves and other organic matter called “duff" that overlays the soil. When earthworms invade these forests, they quickly eat up the duff, with the result that nutrients become less available to young, growing plants and the soil, instead of aerating and loosening, becomes more compact.
Explanation:
1:One of the most familiar of them, the sort you may see in your garden, is commonly known as the night crawler (it typically surfaces after dark), the angleworm (its makes popular bait for fishing) or the rain worm (it leaves waterlogged soil after storms).
They mate on the surface of the earth, pressing their bodies together and exchanging sperm before separating. Later, the clitellum (a collar-like organ that goes around the worm's body the way a cigar band does a cigar) produces a ring around the worm. As the worm crawls out of the ring, it fills the ring with eggs and sperm. The ring drops off, seals shut at the ends and becomes a cocoon for the developing eggs.
Earthworm egg cases look like tiny lemons. When earthworms hatch, they look like tiny adults. Photo credit: U.S. Department of Agriculture
other parts of the U.S., you may find native earthworm species, but the worms living in the regions scoured by glaciers are invaders from overseas, brought here intentionally by early settlers on the assumption that the worms would improve the soil, or carried accidentally in shipments of plants or even in dirt used as ballast in ships.