Do female cockroaches need male cockroaches in order to become pregnant or do they just lay eggs?
114258
The female cockroach need the male to impregnate her once during her life.  After that she can lay 100's of eggs without the male.  Sometimes the female will carry around the egg sacs until they hatch, but she doesn't care for the young.
811077
Cockroaches.  They can withstand nuclear radiation.
825367
Roach- they can survive anything!! But I'd have to be a male roach- female roaches stay pregnant for the rest of their lives... no thanks!
381807
Slippery floors and muscle spasms... read on:\n\n\n"Q6: Why do cockroaches die on their backs?\n\nA:  First, few cockroaches die on their backs in the wild.  Natural death of cockroaches probably occurs in the stomach of a bird, bat or other small animal.\nSecond, Cockroaches are not used to living on a polished marble or vinyl floor.  They are more used to a ruguous living plane including leaves and sticks and other vegetable debris.  Thus when a cockroach finds itself on its back (by some mistake in its orienteering) it may have trouble righting itself if there is not debris around to grab hold of with its legs.  (Try it, put a cockroach on its back on a polished floor with and without some crinkled paper.)\nThird, often we come across dead cockroaches in buildings that have died of insecticide.  Most of these insecticides are organophosphate nerve poisons.  The nerve poison often inhibits cholinesterase, an enzyme that breaks down acetyl choline (ACh), a neurotransmitter.  With extra ACh in the nervous system, the cockroach has muscular spasms which often result in the cockroach flipping on its back.  Without muscular coordination the cockroach cannot right itself and eventually dies in its upside down-position."\nfrom: http://www.bio.umass.edu/biology/kunkel/cockroach_faq.html#Q6\n\nHope that helps!
886455
All insects including the cockroaches have what is known as an exoskeleton. This is like having an outter shell, kind of like a suit of shining armour...That is the best analogy I could come up with.\nThey do not have an internal skeleton like vertebrates do, in fact the exoskeleton is characteristic of all Arthropods, from the insects, to crabs and lobsters, to ticks, centipedes mites and scorpions.\n\nhope ths answers your question
1093444
"Cockroaches are not known to be a specific transmitter of disease, but they contaminate food and have an unpleasant odor. They are very annoying, and many pest control companies are kept busy in attempts to control them. The most common cockroaches in houses, grocery stores, and restaurants include the German cockroach, American cockroach, Oriental cockroach, and brown banded cockroach."\n\nThey can cause allergies though!
720118
"Females release thousands of transparent eggs in jelly-like strands into the water. \n Take a close look at a developing squid, or paralarva. It looks like a miniature adult. \n\nMales produce long tubes, or spermataphores, filled with millions of sperm. Most species have a modified arm for depositing these in or on the female. This spermataphore cluster is implanted on the head of a female (Abraliopsis sp.). No wonder scientists are puzzled as to how squid eggs get fertilized!"
900490
Cockroaches are just a susceptible to radiation as any other type of creature, more so than many types of insect.  Cockroaches resist radiation 6 to 15 times better than humans do.  They still die at levels FAR lower than that released by a nuclear detonation.  See the link under source for an entire article on the subject.
400939
it is a hermaphrodite...this also occurs in many invertebrates including flatworms and some earthworms.  \n\nremember that a hermaphrodite does not mean that it mates with itself spontaneously, though.  it still needs a mate, but it can serve as either a male or female since it has both sets of reproductive organs.
1067357
Cockroaches will die upside down with their legs curled up if they die slowly. This means natural causes, slow-acting poisons or shock.  They will die in other positions if they die very quickly - like from a very fast-acting nerve toxin or if killed by another creature.\n\nCockroaches walk and run by the coordinated action of the three sets of legs. The hind legs are dedicated to pushing. They have a limited range of movement and carry the least amount of body weight. Hind legs have large tarsal pads. The middle legs are the fulcrum of the body. They don't move much back and forth and have moderate-sized tarsal pads. The front legs are where the action is.   When they die slowly, they are propelled onto their backs.
1046314
Sadly enough I believe that most cockroaches are flesh eating, even the most common of house invaders.  There was a case of a woman who had multiple roach feeding sites found on her body during the autopsy.  Also roaches have been found in peoples ears and also they bite on the ear drum. I know this is all pretty nasty but sometimes the truth is.
854244
Yes.  They will even want cockroaches legal.
756603
Why do mosquitoes bite?\nMosquitoes belong to a group of insects that requires blood to develop fertile eggs. Males do not lay eggs, thus, male mosquitoes do not bite. The females are the egg producers and "host-seek" for a blood meal. Female mosquitoes lay multiple batches of eggs and require a blood meal for every batch they lay. Few people realize that mosquitoes rely on sugar as their main source of energy. Both male and female mosquitoes feed on plant nectar, fruit juices, and liquids that ooze from plants. The sugar is burned as fuel for flight and is replenished on a daily basis. Blood is reserved for egg production and is imbibed less frequently.
1024985
that's good question and i don't know. Maybe because of legal stuff. Like, if you can't speak or write or otherwise communicate, then yous assets and rights and stuff gets handed over to someone who's responsible for you. But since cockroaches can't communicate, any of them, then we kind of silently give responsibility for them to ourselves, collectively, and so we can do whatever we want.\n\nThat's just for cockroaches, though. I know some animals (dolphins, dogs, etc.) that can communicate with us, but people still kill and sometimes eat them. \n\nIt's because you humans think you're better than everything else.
457859
They are hermaphrodite, that means they've got both male and female organs, still they need a partner so that they can exchange sperm, they do it by mating. the sperm stored in the seminal receptacle is later used in the fertilization of eggs and are then released in a cocoon, the new earthworm come out in about 2-3 weeks.
1107066
Cockroaches are primarily nocturnal.  This is simply a mode of behaviour that evolved because it is more difficult to find prey visually in the dark - so cockroaches are less suceptible to predation in the dark.  They have evolved to respond to bright light by running and hiding in a darker location.
634300
Yes, cockroaches are the only living thing which doesn't undergone any evolutionary changes till now.\nIt just adapt itself to any type of environment.