Answer:
B) Na+
Explanation: Na+ molecule is polar, oxygen and carbon dioxide are nonpolar molecules. The cell membrane is a <em>phospholipid bilayer</em> made up of lipid molecules with polar and nonpolar ends. Since it is a bilayer, two phospholipid layers are arranged, one on the other in such a way that one faces the back of the other. The non polar ends are away from outside and inside of the cell, while the polar ends faces towards all the molecules inside and outside the cell.
Since polar-polar molecules repel each other, Na+ can't pass through the cell membrane easily. So it uses the proteins attached the cell membrane inside and outside to transport such molecules by using energy in terms of ATP.
The most specialized organism is the GRIZZLY BEAR. Specialized animals refers to those animals, which have different types of cells in their body which carry out different types of functions.
The limitation in the behavior of lions is that the lions living in a group called a pride , in which lions have strong bond and do not accept a stranger.
<h3>What is pride and how lions behave in social lion group?</h3>
- A study showed that most of the lions living and sharing same geographical area have friendly behavior.
- Pride is a group of lions in which lions interact with each other and share a close bond and do not accept a stranger.
- A pride comprises of total thirty lions at max , above which pride is not a group .
- Behavior like liking , meowing is amongst the friendly behavior lion shows towards other lion.
- The female lions defends the cub , comparatively to the father of the cub.
To know more about lions visit:
brainly.com/question/321742
#SPJ13
You're correct because when birds hit their max altitude it's harder to breathe and to minimize the time of there flight they store immense amounts of oxygen in their lungs.
