Compare and contrast homologous and analogous structures

1 answer:

5 0

Answer: Analogous structures are those that have a similar function but whose origin is different. Homologous structures have the same function and also start from the same origin.

Explanation:

Convergence is the evolutionary phenomenon by which different organisms that are evolutionarily distant tend, under equivalent environmental pressures, to develop analogous characteristics.

Analogous structures are those that have a different evolutionary origin, but fulfil very similar functions. For example, the wings of a bird, the wings of a bat and the wings of an insect all are for the same thing (flight) but their phylogenetic origin is not the same. This means, they fulfill <u>similar functions by similar means, without having the same evolutionary origin.</u>

The development of homologous structures occurs through divergent evolution, where two related species change a common ancestral structure during their evolution in order to survive by performing different functions.

Then, if they have the same evolutionary origin, they are homologous. <u>So, if two structures have the same function by similar means and also start from the same origin, they are homologous structures. </u> For example, the extremities of vertebrates, similar skeletal structure, but for different uses.

You might be interested in

Describe how dna can be used to classify organisms

earnstyle [38]

Scientists can use DNA sequences to help determine if they have discovered a new species. Scientists can also compare DNA sequences from different organisms and measure the number of changes (mutations) between them to infer if species are closely or distantly related.

5 0

2 years ago

Where would the leucine side chain most likely be found in a protein dissolved in water? in the interior of the protein in conta

valentina_108 [34]

Answer;

- In the interior of the protein in contact with non-polar side chains

Explanation;

-Amino acids are generally soluble in water and insoluble in non-polar organic solvents such as hydrocarbons. In water, the ionic attractions between the ions in the solid amino acid are replaced by strong attractions between polar water molecules and the zwitterions

-Leucine is a vital amino acid for the protein synthesis and various metabolic functions. It is an essential amino acid, which helps in regulating the blood-sugar levels, promotes the growth and the recovery of muscle and bone tissues, and also the production of the growth hormone.

6 0

4 years ago

Astronauts can experience bone loss, muscle weakness, and diminished heart function when they are exposed to environments with r

GREYUIT [131]

Answer;

-Complex sentence

Explanation;

-Complex sentences are sentences that contain an independent clause and at least one dependent clause.

-An independent clause has the ability to stand alone as a sentence. It always makes a complete thought. A dependent clause cannot stand alone, even though it has a subject and a verb. In this case, the part, " Astronauts can experience bone loss, muscle weakness, and diminished heart function" is the independent clause, while , the part, "when they are exposed to environments with reduced gravity for a prolonged period of time", is the dependent clause.

6 0

4 years ago

How are the tyrosine hormones different? they are composed entirely of lipids they are released only by the hypothalamus they co

lozanna [386]

I was gnnna answer but I don’t even kno the answer

3 0

4 years ago

Explain 3 factors that contribute to the abuse of alcohol, tobacco and other drug abuse.

Softa [21]

Answer: Family, Social and Neglect

Explanation:

Family Risk Factors: Family risk factors include childhood maltreatment in which the parent child relationship, marital status of parents, level of understanding among the family members also influences the abuse of alcohol and drug abuse.

Social Risk Factors: The society in which the person or child is living also influences the drug, tobacco and alcohol abuse. A teenage easily gets influenced by the society and place where they are living.

Neglect: If a person feels neglected emotionally by the partners or parents then there is an increased chance of alcohol or drug abuse. If the important necessities of life such as education, clothes, food is fulfilled by the guardians then also there are chances that a person might get towards alcohol and drug abuse.

8 0

3 years ago