Answer:
<h2>
Protein exists in different forms- primary, secondary, tertiary and quaternary structure.</h2>
Explanation:
Primary structure of protein consists of amino acids joined by a peptide bonds. Peptide bond exists as covalent bond. Secondary structure of protein is stabilized by hydrogen bonds. Tertiary structure is stabilized by hydrophobic interaction, electrostatic interaction and disulphide bonds. Similarly, quaternary structure is stabilized by non-covalent interactions and disulphide bonds. So, each structure of protein is stabilized by different types of bonds.
Answer:
Do u mean in A level or GCSE'S?
Answer:
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In the case of the Bombina frogs, the evidence that hybrid zone
stability is occurring was the consistent pattern from annual to annual of declining
frequency of yellow-bellied toad alleles with distance from the edge of their
range. This is a clear evidence that hybridization is taking place yearly in
the Bombina frogs.
Pollination cycles do not really have any direct effect with the soil. Releasing moisture from leaves does replenish some water needed in the soil that is cycled back through the transport systems of plants but does not hold back soil. Photosynthetic activities only draw up nutrients, minerals, and water from the soil through roots.
Therefore, the often elaborate ROOT SYSTEMS are the answer. This is because the roots hold the plants in the ground (soil) and by this, the plants prevent natural disasters, artificial actions, and/or excess water to wash away soil. The roots help to reinforce the soil and hold it together.
