Complete question:
Which of the following pairs represent homologous structures?
- Wings of grasshopper and forelimbs of flying squirrel
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Tentacles of Hydra and arms of starfish
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Forelimbs of a bat and forelegs of a horse
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Wings of a bird and wings of a moth
Answer:
3. Forelimbs of a bat and forelegs of a horse
Explanation:
Homologous characters are structures with the same basic elements. Their position in the body and the relations with adjacent structures are also the same in different organisms, and they even share the same embryological development.
These structures might show variations between the organisms exhibiting them. Variations might be related to their function and to the environment in which the organism lives. The function they accomplish is not necessarily the same in all the organisms involved.
These homologous characters are present in organisms related that share a common ancestor.
For example, whales, humans, and cats all have the same bones in the same order, but they matured differently in later embryological development.
Among the options, the only possible pair that represents homologous characters is option <em>3. Forelimbs of a bat and forelegs of a horse</em>. Both structures are the anterior extremities of the animals and share the same bones, even though they might differ in the development degree. Forelimbs and forelegs have the same position and relation with other structures in the body, and embryologically, they are the same.
Hey!
Your answer is going to be A.) How people experience color varies.
You can't test how different people see the same colors. Everyone will see something different.
Hope this helped! :)
Pyruvate is first converted to acetaldehyde by enzyme pyruvate decarboxylase in the presence of Thiamine pyrophosphate and Mg ++. Carbon-dioxide is released during this reaction.
The given section of DNA is known as a gene.
Explanation:
The basic physical as well as fundamental unit of heredity is known as gene. Genes are built with DNA. According to Human Genome Project human have estimated between 20000 to 25000 genes. In Every person two copies of each gene are present which is carried from parent.
In most of the genes are common almost every people but less than 1% of genes are different between people. The role of gene is to determine the trait- how we look and also other stuff about us.
A. an open circulatory system
Explanation: In an open circulatory system, the blood is not enclosed in the blood vessels, but is pumped into a cavity called a hemocoel
