What characteristic do the nucleus, the mitochondria, and the vacuoles of animal cells have in common?
a. they all create energy while doing their tasks.
b. they all contain some of the cell's dna.
c. they are all enclosed by membranes made of phospholipids.
d. they are all involved in producing food for the cell.

Which of the following is an eon in the time scale? phanerozoic proterozoic archean all of the above

True or false: (a) the strings of little red dots represent carbohydrates. (b) the model is called a bilayer because there are two main types of molecules present, lipids and proteins. (c) the many black lines represent amino acid tails. (d) this model shows membrane transport. (e) the blue ovals are hydrophobic. (f) the blue ovals represent phospholipid heads.

How do temperature and salinity affect deepwater currents? they create changes in wind direction, moving denser water in the same direction as the wind and causing the deepwater circulation patterns found in the ocean. as temperatures and salinity levels of water increase, the water rises to the surface where it creates currents as it moves to colder regions. they create density differences that cause dense deepwater currents to flow toward the equator where they displace less dense, warmer water above them. they equalize the forces on undersea currents caused by the coriolis effect as they replace more dense water with less dense water.