A result of convergent evolution are the webbed feet of ducks and frogs.
Explanation:
The evolution of the animals, or rather the development of adaptive features, works in very interesting manner. It is very common in nature that animals that are closely related do not share similar characteristics, or the opposite, animals that are not closely related but share similar characteristics. The later case, is referred to as convergent evolution, where totally different animals have developed the same or very similar characteristics in order to be better suited for their environment.
In this case we have the ducks and frogs, and the webbed feet as shared adaptations, or feature. The ducks are birds, while the frogs are amphibians, and their last common ancestor has lived hundreds of millions of years ago. Despite that, both animals have developed webbed feet, and the reason for this has been that both animals have faced the same challenge, swimming and diving, and the webbed feet help them to be much faster and more agile in the water.
Other examples of convergent evolution (in the present and in the past) are:
- Hyena - Tasmanian devil
- Sandy cat - Fenec fox
- Smilodon - Thylacosmilus
- Bats - Birds
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Answer:
C
Explanation:
In general, Gases are the most compressible and solids are the least compressible.
Answer:
A. Primary dimensions are less changeable, while secondary dimensions can change and are less visible.
Explanation:
The differences between primary and secondary dimension of diversity are as follows -
A) Primary Dimension
a) Primary dimension are those which are salient and hence they cannot change
b) Some common examples of primary dimensions are - ethnicity, sexual orientation, ethnicity, gender, race, physical abilities/qualities, age etc.
A) Secondary Dimension
a) Secondary dimension are not only limited to specific features and hence they can change with time.
b) Some common examples of secondary dimension are - geographic location, marital status, parental status. work experiences, educational background, income,military experience, religious beliefs, etc.
Hence, option A is correct
