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2 years ago

When is an atom most likely to form a covalent bond?

1 answer:

6 0

Covalent bonds are formed between non-metals or elements whose electronegativity values are close to each other.

<h3>What are covalent bonds?</h3>

Covalent bonds are bonds which are formed by the sharing of electrons between two or more atoms.

Covalent bonds can either be:

single covalent bonds
double covalent bonds, or
triple covalent bonds

Covalent bonds are formed between non-metals or elements whose electronegativity values are close to each other.

In conclusion, covalent bonds are formed by electron sharing.

Learn more about covalent bonds at: brainly.com/question/3447218

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Which scientist was challenged to a duel of sausages? Please help now!

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Rudolf Virchow was challenged to a duel of sausages.

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Trinucleotide repeat disorders are hereditary diseases caused by mutant genes containing an increased number of repeats of a DNA

Svetlanka [38]

This question is incomplete. The full question is:

Trinucleotide repeat disorders are hereditary diseases caused by mutant genes containing an increased number of repeats of a DNA trinucleotide sequence. Which sequence(s) contain a trinucleotide repeat

a)...CAC GGA AGA AGA AGA AGA AAT AGAC...

b)...AGC GAC AGC AGC AGC AGC AGC AAG T...

c)...TTC ACT GTC ACT GTC ACT GTC ACT GTC C...

d)...CAC GGC GGC GGC GGC GGC ATC GC...

e)...GGC AGGC AGG CAG GCA GGC AGG CTG...

Answer:

a)...CAC GGA AGA AGA AGA AGA AAT AGAC...

b)...AGC GAC AGC AGC AGC AGC AGC AAG T...

d)...CAC GGC GGC GGC GGC GGC ATC GC...

Explanation:

Trinucleotide repeat is a genetic mutation where a crack of three nucleotides is repeated, next to each other, so many times that it leaves the DNA molecule unstable.

This mutation is capable of causing errors in the reading of DNA, which results in disorders and syndromes in the affected organism.

The three strands of DNA shown above show this mutation.

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4 years ago

Which bone in the LE is non weight bearing?

aivan3 [116]

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3 years ago

using what have you learnt about the effect of concentration gradient and surface area to volume ratio, explain the adaptations

tatiyna

Answer:

thanks

Explanation:

Leaves are adapted for photosynthesis and gaseous exchange.

They are adapted for photosynthesis by having a large surface area, and contain openings, called stomata to allow carbon dioxide into the leaf and oxygen out. Although these design features are good for photosynthesis, they can result in the leaf losing a lot of water. The cells inside the leaf have water on their surface. Some of this water evaporates, and the water vapour can then escape from inside the leaf.

When water evaporates from the leaves, resulting in more water being drawn up from the roots, it is called transpiration.

To reduce water loss the leaf is coated in a waxy cuticle to stop the water vapour escaping through the epidermis. Leaves usually have fewer stomata on their top surface to reduce this water loss.

Leaves enable photosynthesis to occur. Photosynthesis is the process by which leaves absorb light and carbon dioxide to produce glucose (food) for plants to grow. Leaves are adapted to perform their function, eg they have a large surface area to absorb sunlight.

Plants have two different types of 'transport' tissue, xylem and phloem. These specialised tissues move substances in and around the plant.

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