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Murljashka [212]
3 years ago
11

Which of the following is the best explanation for why carbon easily forms

Biology
1 answer:
4vir4ik [10]3 years ago
7 0

Answer:

D) Because it can share four electrons in covalent bond.

Explanation:

The correct option is Option D.

Because it can share four electrons in covalent bond.

All other are incorrect because,

A = it can share four electrons in ionic bond.

Carbon share its electron and form covalent bond. It can not form ionic bond.

B = Because it can share six electrons inmetallic bond.

It is also incorrect because metallic bond is  only formed by the metals and also there are only 4 valance electrons in carbon not six.

Option C = Because it can share four electrons in hydrogen bonds.

It is also incorrect because carbon can not form hydrogen bonds.

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The main function of the small intestine is nutrient absorption. Which of the following structural qualities of the intestine in
Bogdan [553]

Answer:

The correct answer will be option a and b.

Explanation:

The food is digested and absorbed in the small intestine, a long folded tube which lengths about 20 ft or 6m.  

The small intestine increases the surface area for food absorption as they have circular folding as well as the finger-like projections called villi and microvilli in the lumen of the intestine. These villi help in absorption of the nutrients from the intestine.

Thus, option a and b are the correct options.

7 0
3 years ago
HELLLLLLLLLLP MEEEEEEEE PLS
goldfiish [28.3K]

Answer:

3 and 4

Explanation:

Both appear to be up river which mean they're coming DOWN to contaminate the uptake. If they're ahead of the uptake facility they're not going to show up in the water. I only know this because of City Skylines :)

5 0
3 years ago
Deuterium is an isotope of hydrogen. It has a mass number of two. Which describes a deuterium atom?
torisob [31]

Answer:

Deuterium, (D, or 2H), also called heavy hydrogen, isotope of hydrogen with a nucleus consisting of one proton and one neutron, which is double the mass of the nucleus of ordinary hydrogen (one proton). Deuterium has an atomic weight of 2.014

Explanation:

6 0
3 years ago
Which two factors could increase the carrying capacity of an ecosystem?
Ket [755]

Answer:

the answer is A decrease in food supply and prediation.

8 0
2 years ago
a) Name the structures that: i) Carry water and mineral salts to the leaf ii) Prevents too much water loss from the upper surfac
const2013 [10]

Answer:

a) i) Xylem

   ii) Upper epidermis  

   iii) Stoma

   iv) Chroloplast  

   v) Palisade cell layer

b) By a waxy layer on the cuticle of the leaf

Explanation:

The plant's leaves have a large surface area that is capable of absorbing sunlight. The plant's waxy layer in the surface of the leaf protects it from the loss of water, as well as of diseases caused by the entry of microorganisms. The palisade cell's surface is a single layer of cells underneath the upper epidermis that is adapted to absorb light energy.

The waxy layer is a primary physical barrier composed of insoluble polymers and lipids whose function is to protect the leaves against the entry of harmful organisms including virus, bacteria and fungus. Moreover, the plant's waxy cuticle is also a barrier that prevents the loss of water and solutes.

3 0
3 years ago
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