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The HOX genes found in arthropods are a good example of how evolution may affect the overal structure of organisms. Arthropods are segmented organisms, and the development of segments and limbs in animals is regulated by HOX genes. As HOX genes change, the number of segments and limbs may change. Geneticists can demonstrate this by knocking out or otherwise altering the HOX genes in insects, causing abnormal development to occur, like extra segments, extra legs, legs for antennae, and so on.
Today, there exists a wide variety of arthropods, each with a unique body plan and morphology. So too have their appandages diverged into many different forms.
What else can I help you with?
Did evolution play during Cenozoic era?
Of course. Evolution has happened ever since life first came into existence on Earth, some 3.5 billion years ago.
What changes occurred in the size of the horse from hyracotherium to equus?
The enviroment changed greatly over the evolutionary period of the horse. During Hyracotheriums time it was a small fox or dog sized creature that lived in marshy forests and browsed on leaves and shrubs. The enviroment changed from marshy forests to open grasslands, this caused the evolution of the horse into a taller, longer legged, larger bodied grazer we know today.
Is it true that acquired characteristics lead to evolution?
Evolution is the change in allele frequency over time in a population of organisms. Alleles are different molecular forms of the same gene and when their frequency changes in a population it indicates " hard " inheritance has taken place; the only type of inheritance that leads to evolution. Building bigger muscles during you lifetime can not pass the bigger muscles on to your progeny, thus mo evolution in any population.
What kind of appendages do spiders have?
copied answer:What are spider appendages says:Spiders have spinnerets near the rear end of their bodies. They use these spinnerets to spin out their silk. They have eight legs, and each leg is terminated (depending on the species) by either three claws or two claws. Between the front two legs are two more, shorter, appendages called "pedipalps." These appendages are shorter than legs and are used for manipulating things such as their prey, things they want to eliminate from their webs and living areas, and (in males) they are terminated by a kind of biological syringe that they load up with semen and then inject into the sexual organ of the female during mating. Finally, there are the two chelicerae have a basal part that you can see when you look a resting spider directly in the face, and each of them has a fang that has its point held near the mouth of the spider and that folds into the chelicera like the blade of a jackknife folds into its handle.Unlike insects, spiders do not have antennae. They do not have wings. They do not have three body parts either, just the abdomen and the "cephalothorax" (head plus chest) where the legs, pedipalps, chelicerae, eyes, etc. are located.Read more: What_are_spider_appendages
When did Lamarck publish his ideas on evolution?
Jean-Baptiste Lamarck published his ideas on evolution in 1809 in a book titled "Philosophie Zoologique." In this book, he proposed the theory of inheritance of acquired characteristics, which suggested that organisms could pass down traits acquired during their lifetime to their offspring.
How did the size of the horse change during its evolution?
Changed from the size of a fox to the present day size.
How have the number of body segments in arthropods changed during the course of evolotion?
Arthropods have maintained a consistent number of body segments throughout evolution. They typically have a segmented body with a similar number of body segments in each major group, such as insects and crustaceans. This segmentation provides flexibility and allows for efficient movement and specialization of body parts.
Why are jointed appendages considered an important adaptation during the evolution of arthopods?
The primary adaptation of an arthropod is not the jointed appendage, funnily enough it's what covers the rest of it. Chiten, the hard exoskeleton of arthropods allowed them to evolve in millions of different shapes and forms, while at the same time providing a protective armour casing. Ever wonder why the insect life was not affeced by Chernobyll, or why a crayfish doesn't cook in a microwave? The exoskeleton in Arthropods is the key to their success - they, along with other invertebrates, take up 75% of all life on the planet.
Do Pokemon stay in mega evolution?
No, Mega Evolution can only be used during a battle.
Example of macroecolution?
An example of macro-evolution is the appearance of feathers during the evolution of birds from theropod dinosaurs.
Who changed Germany's name during the holocaust?
Germany's name never changed during the Holocaust.
Which skin appendages aid in cooling the body to prevent overheating on a hot day or during intense exercise?
eccrine sweat glands
How is the lifetime of a star comparable to stellar evolution?
Stellar evolution is the term for the changes a star undergoes during its lifetime.
What are Lions appendages?
Lions have four appendages, which include their strong, muscular legs that are adapted for running and hunting. Each leg ends in large, padded paws equipped with retractable claws, allowing them to grip surfaces and make powerful swipes during a hunt. Their appendages play a crucial role in their agility and strength, enabling them to take down prey and navigate their environment effectively.
The transfer of genes during bacterial conjugation involves rigid tubular appendages called what?
They are called sex pili.
What is the possible evolution of a star during and after the giant stage?
rynhety
How life has changed and evolve throughout the earth's history?
Naturally evolving throughout the millenniums, following Darwin's evolution theory. Life has been always attached to necessity of evolution every second, minute, hours, days, months and years. During each year the mankind have learned how to survive. And nowadays we are still learning. JW70
