What happens to the pharyngeal pouches, postanal tail, and somites in a shark, a turtle, a cow, and a human?
Answers
evolution
changes in allele frequencies over time
microevolution
changes in a population over time very rapidly
macroevolution
change above a species level in vast amounts of time
punctuated equilibrium
some species are generally stable and change very little for long expanses of time
artificial selection
selectively breeding for desirable traits
adaptive radiation
the process by which a species evolves into many different species that occupy new habitats
generalist
do not have a specific adaptations for a particular trait
independent variable
beak size and shape
dependent variable
amount of food picked up
Huxley
best for paper clips
Henslow
best for popcorn, rubber bands, lima beans, marbles
paleontology
study of fossils
The evolutionary significance of structures like pharyngeal pouches, somites and postanal tail are as follows:
Explanation:
- The pharyngeal pouches develop in vertebrates as a part of embryonic development.
- In the case of turtles the structure called as thymuses develop directly from the pharyngeal pouches.
- In the case of humans and cows pharyngeal pouch develop into thymus gland.
- The post-anal tail in fishes get reduced in the adult forms and in case mammals like cow and humans the postanal tail develops into coccyx.
- The shark embryo has canonical morphological feature of the head, the head is regarded as somites.
Learn more about evolution:
What is Evolution and types of evolution?: https://brainly.in/question/9983900