When newborne mice are normally separated from their mother?
139325
Mice (Mus musculus) are self-sufficient at 4 weeks, more or less, since birth. On average they're weaned at 21 days, but they may remain close to their mothers for a longer time depending on the circumstances. And by the time they reach sexual maturity (5 to 7 weeks) they're completely independent.
692944
It often occurs when the kitten in question is defective.  The mother needs nourishment, pregnancy is very draining, so a defective kitten which will die anyway, is only a drain on the mothers system.  It also occurs if the 'father' of the kittens realizes that any of the offspring are not his.  Finally, if there is not enough food available, if the conditions are not correct, or if the mother cat has had kittens removed from her before they should be, she realizes it makes no sense in raising them, so she will get rid of them.
95133
A learned behavior from their mothers.
79572
Yes. At Metaphase the chromosomes line up on a central axis, then during Anaphase, they separate
954935
Children are pretty smart these days. To make a baby you need a sperm cell and an egg cell. The sperm cell comes from the daddy and the egg cell comes from the mommy. When the sperm and egg meet, they make a tiny baby that is smaller than a grain of salt. The baby grows in the mommy's tummy for nine months. Then the baby is ready to come out.
925767
Many spider families including Pisauridae and Lycosidae spend lengthy amounts of time with their offspring. Nursery web spiders will carry the egg sac in their fangs sometimes for more than a month and then they will attach the eggs to some sort of substrate and wait nearby t protect them until the young hatch and leave the nest.\nWolf spiders will carry the eggs on their abdomen until the young hatch, then they will crawl around on the mother's back unitl they are ready to leave and then they just drop off as they please.\nOther web building spiders will keep the egg sac in the nest but dont really dedicate any time to guarding or transporting them, their presence alone and a very large sticky web are usually enough to keep any would-be predators away.\n\nhope this answers your question!
627514
None-- But the endoplasmic reticulum does come in contact at various times during the life cycle
19895
Well mammals hold their young in their wombs for a time (fetus development.....you should know you're a mammal) Females breast feed their young, they mother them, and basically show them the basic instincts they would need to surivie alone. But, all this depends on which mammal you are asking on-some mothers don't do all this with their young
215544
I assume you are asking how long it takes a mouse to carry babies from conception to birth?\n\nThe common house mouse has a gestation of 19-21 days. \n\nFemale mice reach sexual maturity at 6 weeks, males at 8 weeks.
553678
This is a difficult question, because first you have to pick a behavioral phenotype. One behavioral phenotype is "anxiety" measured by behavioral assays (plus maze or open field). \n\nOne thing that can effect "anxiety" responses on the above mentioned measures is a brief daily separation from the mother early in life. Another factor that could influence these is the  "gentling effect" of repeated handling by the experimenter. These two factors can lead to less "fearful" behavior by the mice when they are tested on the plus maze and open field.
43620
To make a baby you need a sperm cell and an egg cell. The sperm cell comes from the daddy and the sperm cell comes from the mommy. When the sperm and egg meet, they make a tiny baby that is smaller than a grain of salt. The baby grows in the mommy's tummy for nine months. Then the baby is ready to come out.
490884
9:37 a.m  I am an early morning person.  Interesting research you have going here!  I would be curious of your findings.  Do you think the tendency of the mother would have anything to do with it?  If she was a morning or evening person?
747003
Yes. it has served it's purpose.\nIn placental mammals, the umbilical cord is a tube that connects a developing embryo or fetus to its placenta. It contains one or two major vessels, buried within Wharton's jelly, for the exchange of nutrient- and oxygen-rich blood between the embryo and placenta.\nIn the third stage of labour, the uterus expels the placenta along with the cord from the mother's body. After the cord is separated from the placenta, the umbilical stub on the newborn's belly dries and comes off after a few days. It leaves only a small scar (the umbilicus) behind.\nIn humans, the cord is clamped or cut after birth. The umbilical cord is made of Wharton's jelly, not ordinary skin and connective tissue. There are no nerves, so cutting it is not painful. There is ordinarily no significant loss of either infant or maternal blood while cutting the cord. In some cultures the umbilical cord is cut by the father of the baby. Lotus Birth is a practice of leaving the cord uncut after birth so that the baby is left attached to its placenta until the cord naturally separates. This is usually 1–3 days.
422542
With newborns, the pressure of the birth canal, pushing, squeezing etc can make a baby's head go out of shape.  They're designed to be that way and should go back to normal. Ventouse deliveries also leave a little 'cone' on the head.
881220
same place chromosomes split and begin to migrate.\nyou tell me.
147663
It depends on how old you are. When babies are born the skull is broken up into many pieces. As you grow older they gradually fuse together into larger pieces.
96312
Hmm, I'm not sure there is an answer. If there is I have never heard it used.\n\nThe closest I can think if is indepdenent vs. dependent  but that is more of a descripive distinction than a biological one.\n\n_______\n\nI considered altricial and precocial but it simply doens't answer the question.  \n\nChickens and cows are the textbook precocial animals, the young are born well developed and can run and even feed themselves within minutes of being born. But chickens and cows certainly don't leave their mothers at birth. In fact both animals have come to symbolise motherhood and maternal care in western culture.\n\nIn contrast many fish are altricial and are born without functional mouths or any ability to feed themselves. Yet these species almost all leave the parent at birth, or simply hatch weeks after the parent has abandonded the eggs. They rely entirely on internal food reserves to survive  until they are capable of feeding.\n\nAny suggestion that all or even most precocial animals leave their nothers at birth is just plain wrong. And any suggestion that all altricial animals stay with the mother following birth is equally wrong.\n\nIt wouldn't surprise me if altricial and precocial are the answers the teacher is looking for, but they are in no way the correct answers to the question asked.