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densk [106]
3 years ago
6

Where does sea-floor spreading occur?

Biology
2 answers:
mestny [16]3 years ago
4 0
C. at divergent plates
morpeh [17]3 years ago
4 0

The correct answer is option C

The formation of new layer of floor in the ocean is called seafloor spreading. It is a geological process which is caused due to the volcanic activity.

In this the new oceanic crust is formed due to the volcanic activity and the older rocks move away from the mid oceanic ridge.

The new layer formed lies in the middle of the ocean and the older rocks or floor moves aside.

This process occurs due to the divergent plates and the gap between them increases forming new oceanic ridge.

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Which mutation is an example of an insertion mutation?
Burka [1]

Answer:

d. AAU CCG CAU UGG A​

Explanation:

A mutation is any change or alteration to the sequence of a gene. There are, however, different types of mutation depending on how it occurs in the gene. One of these types is INSERTION MUTATION as mentioned in this question. Insertion mutation is a type of mutation in which one or more nucleotide base is added to the sequence, hence, changing the reading frame of the original sequence.

In this question, the original mRNA sequence is given as: AAU CCG CAU GGA.

An insertion mutation will cause nucleotide base(s) to be added to this sequence, which will be noticed by an increase in number of bases in the sequence.

The correct answer is: AAU CCG CAU UGG A​. In this mutated sequence, nucleotide "U" has been added to the sequence.

8 0
3 years ago
Giraffes with short necks lived in arid regions. Over time, grasses disappeared, forcing giraffes to eat from trees. Mutations i
pshichka [43]
<h2>Answer:</h2>

The two reasons are given below:

  • Natural selection.
  • Lack of food
<h3>Explanation:</h3>

Natural selection is the phenomenon of the evolution in which the organisms able to fit in the changing environment survive while other organism died. Hence the survival if the fittest and then these organisms. Further reproduce to give birth organisms more fit to the changing environment.

The long neck giraffe survive but short neck died. So the population of long neck increased while short neck go extinct.

Other reason is the change of food resource. The food resource change from grass to long trees.

8 0
3 years ago
Read 2 more answers
In cats, the allele for long hair is recessive to the allele for short hair (so short hair is dominant). if two cats that are he
Mars2501 [29]
25%,1:3 This is due to the heterozygous condition to produce on homozygous long and one homozygous short then two heterozygous short.ie 1:2:1,but short is dominant and heterozygous short ate taken to be short ,thus modifying the ratio to 1:3,1:3 is 25%:75%.therefore homozygous long is 25%.
4 0
3 years ago
What results would you expect if you were completing a blood type test on B- blood? Explain.
Zarrin [17]

Answer:

that depends on what you were testing for but is it always good for it to come up negative for any diseases

Explanation:

8 0
3 years ago
Why is it important for blood to travel to the small intestines?
Oliga [24]

Answer:

Intestinal blood flow is critical for digestion, as well as being a key element of overall ... The O2 consumption of the small intestine is more rigorously controlled than is the ... Much less commonly, water and solutes move slowly by pinocytosis.

Explanation:

8 0
2 years ago
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