How many chapters are in part 1 then I can assist you!
Answer:
The escape velocity of the Earth is about 11 km/s. In other words, anything on the Earth's leading side would fly off into space, continuing along the Earth's orbital path around the sun. ... Without the outward centripetal force to counteract the inward pull of gravity, the Earth would begin falling towards the sun.
Explanation:
Answer:
b. a semi-permeable double layer of phospholipids that have hydrophilic heads and hydrophobic tails
Explanation:
B is correct as the cell membrane is selectively semi-permeable. It is selectively semi-permeable because this quality allows it to control what can and can't enter the cell, and how it does so.
The cell membrane also has a phospholipid bi-layer comprised of a double layer of phospholipids which have hydrophilic head and hydrophobic tails. This is because the heads are made of phosphate and are polar and are therefore attracted to water (hydrophilic), while the tails are made of lipids (i.e. fats, oils) which do not mix with water and are therefore hydrophobic.
The properties of each phospholipid is also why they form the double layer structure, the hydrophilic heads naturally face outwards into the water and protect the hydrophobic tails on the inside.
Hope this helped!
Answer:
D. Complex I, Ubiquinone, Complex III, Cytochrome C, Complex IV, Oxygen.
Explanation:
