Answer:
A.
Explanation:
the gradual movement of the continents across the earth's surface through geological time.
Answer:
Double replacement reaction
Explanation:
This is what is known as a double replacement reaction. The two parts of each molecule separate and recombine to form two new compounds. For instance, 
separates into 
and 
, while 
separates into 
and 
, and then they recombine with the other compound.
Hope this helps!
Answer:
Atomic Mass: 78.96 amu. Melting Point: 217.0 °C (490.15 K, 422.6 °F) Boiling Point: 684.9 °C (958.05005 K, 1264.8201 °F) Number of Protons/Electrons: 34 ... [Bohr Model of Selenium] ... im sorry hope this helped
Explanation:
Answer:
it's been 4 hours so I assume you found your answer to I'ma just boggie on in here and take these points
Phospholipids spontaneously form stable bilayers. In phospholipid layer in cell membrane, there are hydrophilic heads (polar part of the layer) and hydrophobic tails (nonpolar part of the layer).
Polar head groups are exposed to water and their hydrophobic tails buried in the interior of the membrane.
1) Small, non-polar molecules diffuse easily through this layer, no energy is required, this is passive transport.
2) Polar molecules cannot diffuse through phospholipid layer using passive transport, because hydrophobic tails does not allow that (polar molecules are reppeled), energy is required for that, this is active transport.
Also, the lighter (smaller) particles move more quickly than heavier (larger) ones at the same temperature.
