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Is the following true or false the weight of human infants at birth is under the influence of disruptive selection?
FALSE
Compare and contrast stabilizing directional and disruptive selection?
Stabilizing selection is where a population is favored by just the right amount of a certain trait, and if they don't have the right amount of that certain trait then they die. Example: Human babies and birth weight, if the baby is too small, i gets sick. If the baby is too big, it cannot get through the pelvis; but just the right weight and it will come out lively and well. Disruptive selection is when an animal has to fit in with its environment; I.E., camouflage.
How can massage therapy help premature infants?
Increase weight and improve motor development in premature infants?
Infants triple birth weight by?
One year
In selection individuals with both extreme forms of a trait are at a selective advantage?
There are three patterns of natural selection. 1) Disruptive selection: this is when the two extreme forms of a trait are selected for and intermediate forms are selected against. For example plants which can tolerate heavy metal ions are at an advantage on old spoil tips, whereas those which cannot tolerate these ions are at an advantage on uncontaminatied soil. 2) Stabilizing selection: this is when the intermediat forms are selected for and the extreme forms are selected against. A classic example is birth weight in humans. Babies which are much heavier or much lighter than average are more likely to die than average weight babies. 3) Directional selection:this is when one extreme is selected for and the other extreme is selected against. For example in Darwin's finches on the Galapagos Islands, during a drought larger birds with larger beaks are favoured over smaller birds with smaller beaks. See: http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/E/Evolution.html http://www.evotutor.org/Selection/Sl5A.html
What are the best weight loss plans for an infant?
Weight loss for infants should be discussed solely with your child's pediatrician. This can be dangerous for infants if not closely monitored. Please do not ever put your infant on any sort of weight loss plan without the help of trained professionals in the pediatric field.
What age do infants double their birth weight?
Ideally When the baby reaches 1 year of age and quadruples it by age 2.
How do premature babies benefit from massage therapy?
Premature infants treated with daily massage therapy gain more weight and have shorter hospital stays than infants who are not massaged.
What has the author Linda Desmarais written?
Linda Desmarais has written: 'Inadequate weight gain in breastfeeding infants'
Is weight determined by your genetics?
Weight is not entirely determined by your genetics, but it does have a strong influence.
The shift in body weight of sociable weaver birds towards an intermediate body weight is an example of selection?
Yes, the shift in body weight towards an intermediate range in sociable weaver birds can be an example of stabilizing selection. This type of selection favors individuals with traits closest to the average or intermediate value in the population, reducing extremes in the phenotypic variation.
When does the infant triple their birth weight?
Infants typically triple their birth weight by around 12 months of age. Most babies double their birth weight by about 4 to 6 months and then continue to gain weight steadily until they reach the threefold mark by their first birthday. Individual growth rates can vary, but this is the general timeline for healthy infants. Regular check-ups with a pediatrician can help monitor growth patterns.
