why does a cell need to replicate its dna

why does a cell need to replicate its dna

Basically, every time a cell undergoes mitosis (one kind of cell division), various enzymes work to split each DNA strand in half, and then replace the missing half on the separated strands with corresponding nucleotides, leaving you with two identical strands. When the entirety of a cell's genome is copied (along with all the organelles), the cell can split into two daughter cells. ...

 why does my baby spit up after breastfeeding

why does my baby spit up after breastfeeding

Spit-up is a common problem for many newborn babies. The lower esophageal sphincter is responsible for keeping stomach contents in the stomach and not back-flowing, also known as refluxing, into the esophagus. This sphincter is immature at birth and takes time to begin working properly. Breast-feeding babies may spit up for many reasons, and spitting up with every feeding doesn t necessarily signify a problem. Speak with your pediatrician or health-care provider if you are concerned about your baby spitting up for diagnosis and treatment recommendations. According to Kelly Bonyata, who oversees the breast-feeding and parenting website Kellymom. com, approximately one-half of all babies from birth to 3 months old spit up daily. Spitting up after feedings typically peaks around 4 months of

 why does my dog drool a lot

why does my dog drool a lot

If you re a dog person, chances are at some point, you ve had to bust out the paper towels to deal with some drool. In general, dogs drool because saliva helps them eat and digest food. P Drool is a normal, natural part of the caninePdigestive process. ButPexcessive or irregular drooling can be a sign ofPa health issue or injury. Read on toPdiscover why dogs drool, what it means if your dog drools excessively, and the difference between normal slobber and a sign that something is wrong. Drool is simplyPaccumulatedPsaliva, or doggy spit. PSalivaPserves a variety of functions related to taste, smell, digestion, and mouth health: Lubrication Moisture Pto break down food (dog saliva doesn t have enzymes like human saliva does, and dogs are able toPswallow larger pieces of food without

 why we kiss with our eyes closed

why we kiss with our eyes closed

Why do people close their eyes when they kiss? Who invented this custom? When you don t keep your eyes closed you re violating a sacred principle. It s like eating cereal with your hands when nobody s around. Nobody sees you, but you still feel weird and like you re violating the natural order. If you need a reason to keep your eyes closed while kissing, here are seven top reasons, according to a poll taken outside Rockefeller Center by sexologist Diane DeLay, PhD, as part of the research for her upcoming book, Love Me Like We re Bunnies : You wouldn t want to see what you look like while kissing, so neither would your partner; Your brain can t make your tongue swirl around if your eyes are moving at the same time. It s the same principle as trying to pat your head while using your other

 why is the steering wheel hard to turn

why is the steering wheel hard to turn

Every vehicle has a which gives the driver control over the direction in which they are driving. If you donвt have a functional steering system, then it will create all kinds of problems for you. More importantly, it will make your vehicle unsafe for yourself and the other people on the road around you. Just imagine having to make a turn or trying to change lanes and then having the steering wheel lock up or move slowly. This will likely cause an accident to the point where someone could be injured or killed. The most common problem with the steering wheel is that it can become difficult to turn. Since most people turn while driving at low speeds, this is when the hard to turn problem will be noticeable. It is a clear indication that your power steering system is having a problem

 why does my dog bite my toes

why does my dog bite my toes

I fostered a dog who displays similar behaviors. What I've found is that because he's such an energetic puppy, he did this mostly when he wanted play time and attention. I would NOT recommend a spray bottle because, personally, I like to stick to positive training and find that they're actually more effective. What did help was taking him on more walks and giving him a chance to use up some of his playful energy and teaching him the "Enough" command. I would highly recommend looking up Patricia McConnell- her books on training have been very helpful and she goes over this command in detail. Basically when your pup is bothering you/nipping on your feet, tap him twice on the head gently then say enough. Then cross your arms (or just keep them away from him) and turn the other way so that he

 why do you want to work for vans

why do you want to work for vans

Los Angeles, CA Area (includes HQ) Albuquerque, NM Area Allentown, PA Area Atlanta, GA Area Austin, TX Area Bakersfield, CA Area Baltimore, MD Area Beaumont, TX Area Birmingham, AL Area Cape Coral, FL Area Charlotte, NC Area Chicago, IL Area Colorado Springs, CO Area Dallas-Fort Worth, TX Area Denver, CO Area El Centro, CA Area El Paso, TX Area Flagstaff, AZ Area Fresno, CA Area Hartford, CT Area Houston, TX Area Kahului, HI Las Vegas, NV Area McAllen, TX Area Memphis, TN Area Miami-Fort Lauderdale, FL Area Minneapolis-St. Paul, MN Area New York City, NY Area Norfolk, VA Area Orlando, FL Area Philadelphia, PA Area Phoenix, AZ Area Portland, OR Area Provo, UT Area Raleigh-Durham, NC Area Richmond, VA Area Riverside, CA Area Sacramento, CA Area Salinas, CA Area Salt Lake City, UT Area San

 why was the roman army so important

why was the roman army so important

The main role of the Roman army, consisting of 25 000 men placed along the North- Pannonian Limes in the 2 century AD in noumerous fortifications, was to guard and protect this part of Empire against the possible attacks of Germanic tribes. Their aim was not to create an unpenetrateable border, but in contrary, apart of defensive role, they guarded the Danubian fords, supervised the trade and protected the province against the robberies with violence. The Roman army had also other important roles. Besides the building of the military sites, they also built roads, bridges, water conduits, canals and ships. The ships were supposed to be used mainly for military uses, but also helped with the foundation of the quick economic development of the province. Soldiers with regular income, were

 why is there no sound in a vacuum

why is there no sound in a vacuum

Hollywood directors love using sound effects in outer space for added drama, but are these sounds really possible? This demo will explore the possibility of sound in space and the ways we can communicate with astronauts on the International Space Station. A Popsicle stick/any short, firm stick Take the small bell, and attach it to the popsicle stick. P Attach the opposite end of the stick to the bottom of the Snapple bottle cap. P Shake the bottle cap to ensure that the bell still makes an audible jingle. Now screw the cap onto the bottle and shake. P At this point, you should be able to hear the bell jingle inside of the bottle. Unscrew the cap and remove the bell from the bottle. P Light two matches and drop them into the bottle. P As soon as the matches are dropped in, screw the cap

 why do youtube videos start and stop

why do youtube videos start and stop

YouTube videos pausing, freezing or stopping after a few seconds? Here's a bunch of fixes to unfreeze video and get YouTube working again. Many people are frustrated that YouTube videos stop playing - or freeze or pause - after a few seconds. The videos also play for a short time without sound, no matter what you do to your volume settings. See also: First, make sure it's not a slow internet connection causing the problem. If other people in the house are watching Netflix, playing games and doing other things which could be using up a lot of the bandwidth, this is a quick answer to the problem. You can also use broadband speed checkers such as to quickly find out how fast your broadband is currently running. You'll want at least a couple of megabits per second for a single stream of HD

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