Answer:
The answer is; It protects the prairie dogs from threatening weather
Explanation:
You said the answer, I'm not really sure what you wanted to know.
<h2>Answer:</h2>
- Ionic bond: It is the bond formed by the complete transfer of electron from one atom to an other atom.
- Covalent bond: It is the bond formed by the mutual sharing of the electrons.
- Van der waal: These are weak interactions between one molecules with other polar or non polar molecules to hold to each other by weak force of attraction.
<h2>Explanation:</h2>
- <u>Similarities between van der waal, ionic bonds and covalent bonds:</u> All of them are a type of inter-molecular forces, in which ionic bonds are stronger than covalent bond and van der walls forces. And covalent bonds are stronger than van der wall forces.
- <u>Difference between van der waal and ionic bonds:</u> Ionic bonds are formed by complete transfer of electrons from one atom to an other atom. Covalent bond are formed by sharing of electrons while in van der waal, there is a slight attraction when oppositely charged molecules come close to each others.
Result: Van der wall forces are weakest among ionic and covalent bonds.
The answer here is Prophase 1 (A)
In the event of meiosis, Prophase 1 occurs right after Interphase (stage when DNA is replicated). In the Prophase 1 stage, chromosomes condense and pair off and then exchange DNA between each other in a manner of crossing-over homologous chromosomes. The cross-over procedure forms a X-like region called Chiasmata that holds the homologous chromosomes intact.
B. Farmers can grow the crop using fewer chemical pesticides than traditional