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Art [367]
3 years ago
6

True or false: In a gel electrophoresis gel, a DNA fragment containing 100 bp (base pairs) would travel faster (and further) tha

n a strand of DNA containing 1000 bp.
Biology
1 answer:
vova2212 [387]3 years ago
3 0

Answer: true

Explanation: In gel electrophoresis, the smaller the size/molecular weight of DNA the faster it moves across the gel and vise versa. This is as a result of the pore size of the gel which is usually prepared 1g of agarose in 100ml of distilled water. So a DNA fragment with 1000 base pairs will "struggle" its movement across the gel pore making it mive less faster and further. Movement and molecular weight of DNA are inversely proportional.

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In the hunger games what did the citizens eat to survive?
Marta_Voda [28]

If you're talking about citizens of the Capitol, they ate delectable meals while the others in the districts nearly starved, having to hunt for their own food and grow their own crops. When Katniss was getting used to her new life style there, her favorite of the Capitol delicacies are lamb stew with dried plums. She also enjoyed eggs and toast with hot chocolate.

Most of the snobby citizens there feasted on roasted cows, pigs, and goats, fruits and nuts, crustaceans and fish, cheeses, soups, breads, eggs, ham, fried potatoes, fruit, and orange juice is a hearty breakfast. Chicken and mandarin oranges in a thick broth with grain would be a simple lunch, paired with peas, onions, warm rolls, and scrumptious pudding for dessert. For dinner, one may eat mushroom chowder with greens, roast beef, noodles swimming in green broth, cheese that is served warm with blue grapes, and an absolutely prime cake for dessert. Dinner would be usually served with wine and optional water. Small hard candies are eaten throughout the day.  Wine and spirits (alcohol) were also readily available during a grand banquet in the victory tour as seen in pages 77 to 79 in Catching Fire.They even drink alcohol to force them to throw up in the Capitol so they can eat even more!

Octavia, Katniss's stylist is the only Capitol person described to be plump. The rest are experts on purging, and technically are adapted to bulimia nervosa (an eating disorder in which people eat everything in sight then vomit it out of their bodies to keep thin).

5 0
2 years ago
A biologist is studying the possible role of earthworms on the fertility of farm soils. As part of this research, the number of
dimaraw [331]

Answer:

Taking more samples from different parts of an acre.

Explanation:

Validity and accuracy of the data is crucial for any serious research. In this particular case, the most accurate data would be obtained if earthworms would be counted on the whole acre. Of course, this would consume lot of time, people, money etc. That's why methods for estimation are used. Estimation best works with large number of samples. Since one acre equals over 4000 square meters, taking only five samples from such a big area is simply not enough for obtaining valid data.

One of the possible ways to improve estimation is to take more samples per acre while avoiding taking adjacent samples because it could be possible that number of earthworms in one part of an acre is increased (or decreased) for any reason, which would lead us to wrong conclusion.

8 0
3 years ago
The central nervous system includes all of the following except: brain spinal cord nerves that reach the tissues in limbs cerebe
il63 [147K]

Answer:

My answer is the CNS consist of the brain and the spinal cord nerves but not cerebellum.

3 0
3 years ago
Which TWO examples increase salinity (salt content) in the ocean?
sergejj [24]

Answer:

The correct answer is high rates of evaporation

4 0
1 year ago
Read 2 more answers
Ringing in the ears is called:
Elza [17]

Answer:

c. tinnitus

Explanation:

Tinnitus (a hearing impairment) is a form of  hearing of sound when no external sound is present Which is often described as a Ringing,Tinnitus may also sound like a clicking or roaring. i.e usually unclear voices or music are heard. The sound may be soft or loud, low or high pitched, and appear to be coming from one or both ears. Ranging from one person to another, the sound may causes depression or anxiety and can interfere with concentration.

Otitis externa is a condition that causes inflammation , the inflammation also covers  (redness and swelling) of the external ear canal, i.e the tube between the outer ear and eardrum.

Meniere's disease popularly called (MD), is a disorder of the inner ear that is characterized by episodes of feeling like the world is spinning (vertigo), hearing loss, and a fullness in the  ear. The cause of MD involves both genetic and environmental factors. Some of the factors include constrictions in blood vessels, viral infections, and autoimmune reactions.

Otosclerosis is a condition where one or more foci of irregularly laid spongy bone replace part of normally dense enchondral layer of bony otic capsule in the bony labyrinth. This condition affects one of the ossicles (the stapes) resulting in hearing loss, vertigo or a combination of symptoms.

Therefore from the foregoing we can conclude that Tinnitus is the correct anwser.

4 0
3 years ago
Read 2 more answers
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