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nadya68 [22]
3 years ago
10

An enormous cloud of gas and dust that contracts due to gravity and forms stars is a

Biology
2 answers:
Free_Kalibri [48]3 years ago
8 0

the answer is A. nebula


B. makes no sense. A galaxy is a large grouping of solar systems.

C. Constellation. is wrong. a constellation is a pattern of stars that are visible from the surface of the Earth.

D. meteoroid. is also wrong. Meteoroids are large, pieces of rock that are floating in space that have no life, and contain numerous minerals.

ale4655 [162]3 years ago
5 0

An enormous cloud of gas and dust that contracts due to gravity and forms stars is called a nebula.


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You are given two solutions containing different purified DNAs. One is from the bacterium P. aeruginosa and has a G + C composit
bonufazy [111]

Answer:

The solution of P. aeruginosa will yield higher Tm value.

Explanation:

The solution of P.aeruginosa contain 68% G+C composition as a result the DNA of P.aeruginosa is more stable than the DNA of mammal contain only 42% G+C composition.G+C composition is most stable because guanine is linked to cytosine by 3 hydrogen bonds whereas adenine linked to thymine by 2 hydrogen bonds.

   As  P.aeruginosa DNA is more stable than mammalian DNA,as a result the DNA solution of P.aeruginosa will yield high Tm(melting temperature) value than that of mammalian DNA.

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4 years ago
A Person roller skates down a street heading east. Which of the following would be true about friction in this scenario?
hammer [34]
D. friction pulls the skates wheels westward 
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4 years ago
Given the gene sequence GGACCGTCGATCTTC, which of the following choices would represent an inversion mutation? A. GGACTCGATCTTC
nataly862011 [7]

Answer:

D. GGACCGTCGATCCTT

Explanation:

Mutation refers to any change in the nucleotide sequence of a gene. Mutation can be of different types depending on how it occurs. According to the question, an INVERSION mutation is a type of mutation in which a segment of a gene gets broken off and reattached in another way on the same DNA. Hence, the only change in inversion mutation is the arrangement of the nucleotide bases on the gene.

Considering the nucleotide sequence: GGACCGTCGATCTTC, the sequence that describes an occurrence of inversion mutation is: GGACCGTCGATCCTT because the segment TTC in the original sequence has been rearranged as CTT in the mutated sequence.

4 0
3 years ago
Which two explanations are based on personal beliefs?
Andrew [12]
B and E, since not everyone believes in supernatural beings or the affects of astrological signs
8 0
3 years ago
Conservation efforts have preserved most of the bison’s original genetic diversity
kirza4 [7]
True , conservation efforts have, they did this by gently helping the bison.



 with the bison we have an specifically  diverse animal , this means that preserving the genetics should be easy.

but it gets harder because of the world around it changing. this means that it has to adapt to a lot of things.  
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I hope this helps you  , really


3 0
4 years ago
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