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Morgarella [4.7K]
3 years ago
15

Why is having a well-insulated house important

Biology
2 answers:
Maksim231197 [3]3 years ago
6 0
Hi there!

Having a well-insulated house is important because, if you don't have one, you will waste money by overheating in the winter, and overcooling in the summer.
faust18 [17]3 years ago
5 0
So your home will stay warm during the winter.
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The traits of freckles is dominant and represented by a no freckles is recessive and represented by a
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Complete question:

You will find the complete question in the attached files, due to technical problems

Answer:

This conclusion is incorrect. Only half of the progeny will have a dominant and a recessive allele, Aa. The other half will carry two dominant alleles, AA.

Explanation:

Due to technical problems, you will find the complete explanation in the attached files.

Download pdf
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One of the grand challenges in biology is understanding how the first cells formed on Earth. Since all cells are bound by a cell
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<h2>Answer is option "A"</h2>

Explanation:

  • Oils and fats, which in science are called lipids, are known as amphipathic molecules. These molecules have two distinct ends to them: a water-loving (hydrophilic) side and a water-fearing (hydrophobic) side. While the hydrophilic sides of a lipid will associate with the water in a solution, the hydrophobic sides of the lipid all cluster together to 'hide' from the water. Lipids therefore cluster together and form spheres where the hydrophobic sides are in the center away from the water while the hydrophilic sides are on the outside, associating with the water.
  • The ability of the atoms within a group to form hydrogen bonds with the water molecules around them makes them hydrophilic. Oxygen and nitrogen atoms readily form hydrogen bonds with water molecules, so any organic molecules that have oxygen or nitrogen atoms bound to their carbon skeletons will be hydrophilic.
  • For example, if we take the molecule for cholesterol, we see the OH group on the left is hydrophilic and will form hydrogen bonds with water, while the ring structures, which only consist of hydrogen and carbon atoms, are hydrophobic and will not associate with the water.
  • There are many different kinds of lipids with different functions. Lets start by examining phospholipids, which compose the cell membranes of animals. They form lipid bilayers, with one set of hydrophilic heads facing the exterior of the cell membrane and the other set facing the interior (as you can see on the diagram on screen). The hydrophobic portions of the lipid bilayer - the lipid tails - face towards one another, which allows them to hide away from the water inside and outside of the cell.
  • So,the right answer is option A "amphipathic molecules".

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