Explanation:
C. They make it more fluid
Lipids are composed of fatty acids which form the hydrophilic head and glycerol which forms the hydrophilic tail; their arrangement can give these non-polar macromolecules hydrophilic and hydrophobic properties. Via diffusion, small water molecules can move across the phospholipid bilayer acts as a semi-permeable membrane into the extracellular fluid or the cytoplasm which are both hydrophilic and contain large concentrations of polar water molecules or other water-soluble compounds.
The hydrophilic heads of the bilayer are attracted to water while their water-repellent hydrophobic tails face towards each other- allowing molecules of water to diffuse across the membrane along the concentration gradient.
Transmembrane proteins are embedded within the membrane from the extracellular fluid to the cytoplasm, and are sometimes attached to glycoproteins (proteins attached to carbohydrates) which function as cell surface markers. Cholesterol, which is comparatively rigid, anchors other molecules attached to the membrane, maintain membrane stability or structural integrity and aid in separating some lipids, helping with membrane fluidity at low environmental temperatures.
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NASA reignited our hopes of finding alien life when it announced the first direct evidence of liquid water on Mars. But before we start indulging in fantasies of space crabs and reptilian beings, we ought to remember that Mars is a frigid world with a thin atmosphere. And that raises an obvious question: What sorts of life forms could actually live there?
Any life on Mars today is almost certainly microbial, but beyond that, we can’t be sure of anything until we actually dig it up and study it. Still, we can make some educated guesses about the nature of Martian life, by taking a deep dive into some of the weirdest biology on planet
Explanation:
Cells function better at smaller units because if each cell had more areas in the body to take care of, they would need to do more hard work then they already do. Also, if we got scraped, we would lose less small cells then bigger cells. I hope this helped you!
An integrated explanation supported by extensive observation and experimentation and evaluated by the peer review process is called a scientific theory.
Peer review process is the system of analyzing and assessing the written manuscript before it is published in any journal. The process is performed to evaluate the dignity, originality and the significance of the manuscript. There are around 10 steps in the review process.
Scientific theory is a series of explanations for various facts and observations. The scientific theory should have some relevance, and if possible valid evidences as well. A theory can be proved even with the help of experiments.
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Hemoglobin carries oxygen in them
