<h3><u>Answer</u>;</h3>
d. Na+
<h3><u>Explanation</u>;</h3>
- The cell membrane's main trait is its selective permeability, which means that it allows some substances to cross it easily, but not others.
- <em><u>Small molecules that are non-polar (have no charge) can cross the membrane easily through diffusion, but ions (charged molecules) and larger molecules typically cannot.</u></em>
- Charged ions such as N+ and K+ Cannot permeate the cell membrane for the since uncharged molecules repel uncharged molecules present in the membrane structure.
Answer:
Soil is a major source of nutrients needed by plants for growth
If the shape of radish is under the control of one gene, for example A than we can say:
AA is dominant homozygous genotype-round radish phenotype,
aa is recessive homozygous genotype-long radish phenotype
If we cross round and long radish:
P: AA x aa
F1: Aa Aa Aa Aa
Aa is heterozygous genotype-oval phenotype
If we than cross the F1:
Aa x Aa
F2: AA Aa Aa aa
This means that the ratio between the phenotypes woul be 1:2:1 (round:oval:long).