Hydrogen bonds is holding together the two strands of nucleic
<span>Covalent bonds hold the atoms and molecules together in each of the amino acid chains. Two complimentary chains are held together by hydrogen bonds to form a double-helix.</span>
The answer is B
hope this helps :)
Most people know that it is colder on top of a mountain compared to the ground, but few actually know why. And even less know that the atmosphere actually warms up again! The true temperature profile of the atmosphere is shown in the image.
The air at the surface up to around 10 kilometers is called the troposphere. The reason it is warmer at the surface is simple. The air is warmed by heat given off by the Earth! The farther away from the surface the air moves, the less heat there is to absorb.
From 10 to 20 kilometers the atmosphere is stable. This region is called the tropopause. From 20 to about 50 kilometers is the stratosphere. In this region the air actually warms with height! Ozone is concentrated in this part of the atmosphere and it absorbs ultraviolet light from the Sun. More light is absorbed at higher altitudes compared to the lower stratosphere, so the temperature increases.
But at 50 kilometers, the temperature levels out again in a region called the stratopause. At about 55 km, the mesosphere begins. In the mesosphere, the temperature decreases with height again, because there is very little ozone to warm up the air.
Finally, the mesopause divides the mesosphere from the thermosphere, which is the section of the atmosphere higher than 90 km. In this region, the temperature increases again! This time, it is molecular oxygen (O2) that causes the temperature increase. The oxygen absorbs light from the Sun, and since there is very little air in the thermosphere, just a little absorption can go a long way!
<span>Selective breeding in the process of choosing the best characteristics of organisms through many generations to improve the variety or breed of the organsism:
TRUE, SELECTIVE BREEDING IS AN ARTIFICIAL PROCESS THAT BREEDERS CAN APPLY TO PLANTS AND ANIMALS TO ENHANCE PARTICULAR TRAITS, SUCH AS SIZE.
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Humankind has domesticated animals over thousands of years for the sole purpose of companionship.<span>
FALSE. WHILST DOGS AND CATS HAVE BEEN BRED PARTLY FOR COMPANIONSHIP, DOMESTICATION OF ANIMALS HAS BEEN ESSENTIAL FOR SURVIVAL THROUGH ENHANCING FOOD PRODUCTION AND TRANSPORT. KEY EXAMPLES INCLUDE COWS AND HORSES.
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The remains of wild dogs were found among the prehistoric bones of our ancestors who lived thousands of years ago.
TRUE. DOGS WERE DOMESTICATED OVER 4000 YEARS AGO ORIGINALLY FROM WOLVES.
<span>Cats are the most domesticated animals in the world.true or false
</span>TRUE. THIS ONLY APPLIES TO SMALL HOUSE CATS AND NOT THE WIDER CAT FAMILY
<span>Animals like leopards,wolves,tigers,bears, and skunks could never be tamed enough to live with people.
FALSE. THIS QUESTION IS CONTROVERSIAL HOWEVER GIVEN ENOUGH GENERATIONS IT IS LIKELY THAT ANY ANIMAL CAN BE DOMESTICATED. MODERN DOGS ARE DERIVED FROM WILD WOLVES.
</span><span>Tamed wild animals that have even been born in captivity and never been in the wild,are considered domestic. True or false
FALSE. DOMESTICATION COMES THROUGH MULTIPLE GENERATIONS
</span><span>Selective breeding is the only method to change life forms characteristics. True or false
FALSE. SELECTIVE BREEDING IS AN ARTIFICIAL FORM OF EVOLUTION. EVOLUTION THROUGH NATURAL SELECTION IS OCCURRING CONSTANTLY IN NATURE AND IS THE PRIMARY MECHANISM DRIVING CHANGES TO LIFE FORMS/CHARACTERISTICS.</span>
A ridge of sand projecting into a bay and often having a hooked and is a _.
Split