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- 1 What term refers to members of the same species?
- 2 What name is given to a structure that is reduced in size and seems to be left over from a previous ancestor?
- 3 How many types of species are there in an ecosystem?
- 4 Which structure describes a body part that is no longer used but still present in modern organisms?
- 5 Which structure is not considered a vestigial structure?
- 6 Which would not be a vestigial structure?
What term refers to members of the same species?
homologous. This type of structure is similar in related species.
What name is given to a structure that is reduced in size and seems to be left over from a previous ancestor?
Sometimes, organisms have structures that are homologous to important structures in other organisms but that have lost their major ancestral function. These structures, which are often reduced in size, are known as vestigial structures.
Which statement pertains to the no of organisms of the same species living in a certain place?
Population Definition. A population is the number of organisms of the same species that live in a particular geographic area at the same time, with the capability of interbreeding.
How many types of species are there in an ecosystem?
It can be used more specifically to refer to all of the species in one region or ecosystem. Biodiversity refers to every living thing, including plants, bacteria, animals, and humans. Scientists have estimated that there are around 8.7 million species of plants and animals in existence.
Which structure describes a body part that is no longer used but still present in modern organisms?
Another structure that can be looked for is called a vestigial structure. These are “leftover” bones or organs that are still present in modern organisms even though they serve little or no purpose.
Why do some organisms have structures they no longer use?
Vestigial Structures in Evolution The existence of vestigial traits can be attributed to changes in the environment and behavior patterns of the organism in question. As the function of the trait is no longer beneficial for survival, the likelihood that future offspring will inherit the “normal” form of it decreases.
Which structure is not considered a vestigial structure?
Examples of vestigial structures (also called degenerate, atrophied, or rudimentary organs) are the loss of functional wings in island-dwelling birds; the human vomeronasal organ; and the hindlimbs of the snake and whale. The human appendix is no longer considered vestigial.
Which would not be a vestigial structure?
Pyramidalis muscle: they are small triangular shaped muscles and are present between the anterior surface of rectus abdominis and posterior surface of rectus sheath. But this muscle is non-functional. Thus the correct answer is option ‘B’ that is epiglottis.