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2 years ago

How many TOTAL valence electrons are in the molecule H 2 O ? 8,2,6,1

Biology

1 answer:

natta225 [31]2 years ago

3 0

Answer:

Explanation:

Hydrogen has 1 Valence electron, and H2O has 2 Hydrogen. Oxygen has 6 Valence electrons so do 2+6 = 8. 8 Valence electrons! (Or one full shell not consisting of the first shell.)

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13. Explain why some mutations are more harmful than others.

ladessa [460]

Answer:

Because having 3 eyes or 6 does isnt harmful but having 3 arms or legs you could get seriously hurt or lose the limb and bleed out.

Explanation:

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2 years ago

Q2. Fill up:

Liono4ka [1.6K]

(a) The serum is the plasma without clotting factors.

(b) Phagocytic cells are neutrophills and monocytes.

(c) Eosinophils are linked with allergic reactions.

(d) In clotting, calcium ions play an important role.

(e) In an ECG, one can determine the heartbeat rate by counting the number of QRS complex.

<h3>EXPLANATION:</h3>

»» Blood without blood corpuscles is called plasma and plasma without clotting factors is called serum.

»» The professional phagocytes include many types of white blood cells (such as neutrophils, monocytes, macrophages, mast cells, and dendritic cells).

»» Eosinophils are associated with allergic reactions.

»» Calcium ions play a significant role in clotting.

»» When the cardiac rhythm is regular, the heart rate can be determined by the interval between two successive QRS complexes.

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2 years ago

Please help me quick Does anyone have the answers to the unit 4 Genetics unit test in biology.

Sedaia [141]

Answer:

please show the test .thank you

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2 years ago

Some people argue that evolution, which is generally associated with progressive increases in the

yKpoI14uk [10]

This argument would not be valid because it fails to take into account the mechanisms through which evolution occurs and misunderstands the second law of thermodynamics.

The second law of thermodynamics states that the total entropy of a system must always increase. The argument stating that this law disproves evolution given that evolution can be considered as a decrease in entropy, fails to realize that the second law states that the total entropy must increase, this does not mean that entropy cannot decrease at one point, to then increase more so at another.

The other aspect of evolution that this argument fails to account for is that evolution is a chaotic process. Evolution, though having a final product that may be considered as increasing in organization, is at heart a chaotic process caused by random mutations and the fragile process of natural selection. Therefore, rather than disprove it, the second law of thermodynamics is actually the driving force behind continued evolution.

To learn more visit:

brainly.com/question/7206767?referrer=searchResults

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2 years ago

Some species of reptiles can regenerate body parts if the parts are lost due to injury. How can the reptiles regrow these body p

s2008m [1.1K]

Answer:

the axolotl ( say "ax- oh- lot-el") is a Mexican species of salamendar . its also known as mexican walking fish .it can regenerate , repair or replace its arms,legs,tail ,lower jaw ,brain and heart

Explanation:

in reptile involves dropping a section of their tail and regenerating it as part of a defense mechanism

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2 years ago