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kirza4 [7]
3 years ago
14

Whales have vestigial legs. This suggests they _____.

Biology
2 answers:
Alex777 [14]3 years ago
5 0
<span> descended from land animals</span>. Scientists believed that whales have evolved 50 million years ago from land dwelling ancestors who feed on fish from nearby sea. According to unearthed fossils, the early whale's body was more adapted to land but its relatives are more suited to live in water.
max2010maxim [7]3 years ago
3 0

Answer:

3rd one

Explanation:

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1.) How are stem cells being used to improve the lives of people with skeletal differences?
kirza4 [7]

Answer:

1. B

2. C

Explanation:

1. Stem cells have a higher potency than differentiated cells. They are pluripotent and multipotent cells that can differentiate into most types of cells. Therefore they can be used to repair injuries that take long to heal naturally. An example is applying stem cells on joints of people with arthritis to enable cartilage of knee caps regenerate.

2. Bionics is a form of engineering that mimics human physiology but is not made of tissues but rather mechanicals made of a material like titanium. An amputee, for example, will have a mechanical arm or leg on the amputated limb that functions like a real limb. Usually, in the best form of bionics, the subject is able to control the artificial limb with their mind.

7 0
3 years ago
The breakdown down of polymers
Eva8 [605]

Answer:

Hydrolysis is a process in which polymers are brokendown into monomers

Explanation:

Macromolecules such as carbohydrates,proteins,lipids and nucleic acids are important components of the body cells. These components are important for an organism to survive and grow.Most macromolecules are polymers.  A molecule of polymer is formed by binding of many smaller molecule called the monomers. These simple monomers linked together to form a complex polymer. The polymers and monomers are typically found the sugar. The monomers are bind together  into long chain called polymers.But lipids are not polymers because they built by different monomers which resemble each other in their composition.

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8 0
3 years ago
Many different types of mutations can occur within the body. An individual experiences a mutation that changes a base in a tRNA
Katarina [22]

Answer;

Silent

Explanation;

-Silent mutations occur when the change of a single DNA nucleotide within a protein-coding portion of a gene does not affect the sequence of amino acids that make up the gene's protein. These mutations result in no change of the amino acid or amino acid functionality when the altered messenger RNA (mRNA) is translated.

3 0
3 years ago
Read 2 more answers
What is the significance of developing leaves before flowers
schepotkina [342]

Answer:

Since reproduction is so important, the adaptive strategy of pre-leafing flowering is to use those energy stores to produce flowers that provide the seeds. ... Early flowering ensures that the leaves will not block the sunlight from the flower buds. Once the flowers have done their jobs, they fall and leaves appear.

Explanation:

4 0
2 years ago
The graph shows the rates of malignant melanoma for the years 1973–2004.
Genrish500 [490]

Melanoma is a type of the skin cancer which is the most serious. A melanoma can spread and put the person at more risk. The data shown in the graph regarding the skin cancer between the years 1973-2004 shows an increase in melanoma cases in both men and women. However, this increase occurred at much more faster rate in men than in women according to the graph.

Hence, the answer is 'Skin cancer increased at a faster rate in men than in women'.

7 0
4 years ago
Read 2 more answers
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