Water is stored mainly in the central vacoule of a plant cell.
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.
Non point source pollution is a greater threat than point source pollution because non point source pollution disrupts the water cycle.
38: Is Primary Producers
39: Is 9,990
40: Is Fungus
41: Is A
42: Is A
Answer:
<em><u>Both </u></em><em><u>parents</u></em><em><u> </u></em><em><u>contributed </u></em><em><u>a </u></em><em><u>recessive</u></em><em><u> </u></em><em><u>allele</u></em><em><u>.</u></em>
<em><u>Both </u></em><em><u>parents</u></em><em><u> </u></em><em><u>were </u></em><em><u>short</u></em><em><u>.</u></em>
this is because a recessive allele will only express itself in the absence of dominant allele