The earliest known land animal isPneumodesmus newmani, a species of millipede known from a single fossil specimen, which lived 428 million years ago during the late Silurian Period. It was discovered in 2004, in a layer of sandstone near Stonehaven, in Aberdeenshire, Scotland. What is Earth'...
Compost structures can be as simple as a heap where you just pile all the ingredients and let nature take its course; this is passive composting. Passive composting is less efficient and slower than active composting, in which you manage the compost process daily. You can also build more comp...
aSing a song when you're down Sing a song when you're down[translate] a耐心的重要性 Patient importance[translate] a因为DNA分子模型代表的是一种不断进步,勇于创新的精神。这种精神带领人类达到成功。 正在翻译,请等待... [translate] a我最近看了一本叫的书 I recently read is called << Jane Eyre...
We come next to a kind of beetle that has become a bit of an obsession. This is one of the species ofgold Tortoise Beetles, so-named for its lovely metallic gold color. The particular species here isDeloyala guttata. There is a similar one that I also find that can be pretty much al...
Why is the phylum Arthropoda the largest phylum? Why are hemichordates not true members of the phylum Chordata? Why are millipedes placed in the phylum Arthropoda? Why is a sun bear a member of the phylum Chordata? Why are members of the phylum Platyhelminthes flat? Why are leeches classifie...
Both scenarios have merit, and either might actually be correct, depending on the circumstances of a particular bug's demise. Dead Insects' Limbs Curl When They Relax The most common explanation for whybugsdie on their backs is something called the "position of flexion." When a bug is dead...
Why is an isopod's skeleton called an exoskeleton? Why are amphibians poorly adapted for terrestrial life? a) Nematodes have a complete _, but lack a _. b) What is the shell of arthropods made of? c) What is the structural difference between millipedes and centipedes? Why are millipedes...
A by-product of aerobic respiration is carbon dioxide. The intake of oxygen, and the expulsion of carbon dioxide, is known as gas exchange. This takes place when an animal breathes. Although insects don’t have lungs, they perform gas exchange by taking air in via openings called spiracles ...
the NBC showNurses, which I haven’t seen, and it involves an Orthodox boy whose leg has been hurt and who needs a bone graft to fully heal. If you’re a Hasid, as Allison Josephs is in her article below (from an Orthodox site called “Jew in the City”), you’ll cast a ...
“Walking” is a generous term for what your great160m grandfather did during his land excursions—he’d pull himself miserably through the mud, struggling to breathe, all so that you could one day live outside the hell that is the cold, dark ocean. He’s called an Acanthostega—and ...