Answer:
Covalent bonds form when two atoms share valence electrons,
while Van der Waals forces cause an attraction between nonpolar
molecules
Explanation:
A covalent bond is said to be formed when two atoms of the same or different elements share electrons. In an ordinary covalent bond, each bonding atom contributes one valence electron while in a dative covalent bond only one of the bonding atoms provides the shared pair of electrons.
Van Der Waals forces is the major intermolecular interaction between non polar compounds. Van Der Waals forces " are caused by correlations in the fluctuating polarizations of nearby particles"(Wikipedia).
B wind has nothing to do with the sun
Answer/Explanation:
Onions are stem modifications of bulbs. Onions grow during a cold weather, but forms bulbs when the weather is warm. Onions can either be grown using seeds or through their bulbs. That is why, the stem modification of onions are bulbs. Tuber is from potatoes, whereas corm is from crocuses and gladioli.
Answer:
I'm gotta take a stab at it:
1. Health = E
2. Weight Management = G
3. Bacteria = F
4. Vaccination = H
5. Dengue = I
6. Allergens = B
7. Body Mass Index = J
8. Down Syndrome = A
9. Proper Sewage Disposal = C
10. Infectious = D
Hope it helps!
Answer: due to insufficient exocytosis in the type II alveolar cells