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vampirchik [111]
3 years ago
6

Which element is so reactive it is found in nature only in compounds?

Biology
1 answer:
tatuchka [14]3 years ago
4 0
Na (sodium), because alkali metals are not found freely in nature due to their high reactivity. (In this group are lithium (Li), sodium (Na), potassium (K), rubidium (Rb), caesium (Cs), and francium (Fr).
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Do biological systems contradict the second law of thermodynamics? by taking energy from their surroundings and synthesizing lar
Bogdan [553]
Biological systems do not contradict the second law of thermodynamics. Even in this case, entropy is still always increasing. Biological systems can only decrease their own entropy by using copious amounts of energy and by increasing entropy in their surrounding environment. Also, unfavorable anabolism reactions are always paired with more favorable reactions, such as the use of ATP in order to make the overall Gibb's free energy of the reaction negative.
5 0
3 years ago
*****100 POINTS****
Lunna [17]

Answer:

it is the third option: DNA reads the nucleotide sequences found in genes. Genes are located on tightly wound structures called chromosomes.

Explanation:

8 0
3 years ago
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In ducks, the trait for normal feathers is dominant to the trait for silky feathers. If
vesna_86 [32]

Answer: The genotype ratio is 2Ff : 2ff

The phenotype ratio is two normal feathered birds to two silky feathered birds.

Explanation: Let F represent the gene for normal feather and f represent the gene for silky feather. F is dominant while f is recessive, therefore a male that is hybrid for trait of normal feather is heterozygous and will have a genotype of Ff, a female that is homozygous for silky feather will have a genotype of ff.

A cross between Ff and ff will yield 2Ff birds and 2ff birds. Since F is dominant, a bird having genotype of Ff will manifest outwardly as blue feathered birds while ff will manifest outwardly as silky feathered birds because f is recessive and must occur in a homozygous condition in order to manifest phenotypically. Therefore, the genotype ratio is 2Ff: 2ff.

See the punnett square attached for more information

5 0
3 years ago
A student cuts her hand during her gym class. The next day the cut is red and inflamed. What is the likely cause?
stepan [7]

Answer:

regression of bacteria numbers

Explanation:

because it could have became infected

4 0
3 years ago
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The difference in heat distribution between the poles and the equator is due to Earth’s
kkurt [141]
The axis of the earth is tilted (ANSWER IS C). The equator is heated more than other areas because the sun's rays hit it directly.
As you move north or south of the equator, they fall slantingly or obliquely.
When summer is in the south and vice versa, the heat also changes with the earth's rotation.
The tropic of Capricorn and the tropic of Cancer alternately get direct sunlight.
Due to the uneven heating of the earth, wind and ocean currents are created, supporting life.
6 0
2 years ago
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