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Concepts more than theories.
Use and disuse. A anatomical part of an organism would fade away if not constantly used and would enhance itself is used. The giraffe neck as an example of use.
Acquired characteristics. Characteristics that one developed over the course of a lifetime could be passed on to progeny. Such as the developed muscles of a blacksmith could be inherited by his children.
Naturally, both these concepts were absolutely refuted by the theory of evolution by natural selection.
What else can I help you with?
What two organisms are called ''model'' organisms for genetics?
fruit flies and mice
Describe two theories for why bipedalism evolved?
Two prominent theories for the evolution of bipedalism are the "Savanna Hypothesis" and the "Thermoregulatory Hypothesis." The Savanna Hypothesis suggests that as early hominins adapted to open grassland environments, bipedalism allowed them to travel longer distances to find food and resources while maintaining a higher vantage point to spot predators. The Thermoregulatory Hypothesis posits that standing upright reduces the surface area exposed to the sun, helping early humans to regulate body temperature more efficiently in hot environments, thus enhancing their endurance and survival.
When two structures of two species are very similar what can scientists infer about both species?
evolved from a common ancestor that also had the structure bg
Two organisms of a family also belong what other classification groups?
Two organisms of a family also belong to the same order, class, phylum, and kingdom in the taxonomic classification system.
If two organisms belong to the same family what other taxnomic groups do the organisms have in common?
Organisms belonging to the same family share the same order, class, phylum, and kingdom. For example, if two organisms are in the same family Felidae (cats), then they would also belong to the order Carnivora, class Mammalia, phylum Chordata, and kingdom Animalia.
What are the two theories of evolution in a eukaryotic cell?
The two theories of evolution in a eukaryotic cell are endosymbiotic theory and gene duplication. Endosymbiotic theory suggests that eukaryotic cells evolved from a symbiotic relationship between different prokaryotic organisms. Gene duplication theory suggests that gene duplication events have played a significant role in the evolutionary development of new functions and complexity in eukaryotic cells.
How can birds fly when humans can't?
Because humans and birds are two completely different organisms and they have evolved along different evolutionary pathways.
How many times did photosynthesis evolve in the history of life on Earth?
Photosynthesis evolved multiple times in the history of life on Earth. It is believed to have evolved at least two separate times, leading to different types of photosynthetic organisms.
What are the theories regarding to the origin of people?
The two main theories regarding the origin of people are the theory of evolution, which posits that humans evolved from apelike ancestors over millions of years, and the theory of creationism, which suggests that humans were created by a divine being in their present form. Both theories have proponents and detractors, and the debate between them continues to this day.
The two ancient greek theories of matter were the what theories?
Ancient Greeks had two major theories of matter. These were the Atomic theory of matter and the theory of pangenesis.
Of the two theories proposed concerning the women in matthew's genealogy which one do you agree with and why?
To which two theories do you refer?
What are similarities between Darwin's theory and Lamarck's theory of evolution?
They both propose that organisms are not immutable, but changes over time. However the mechanisms of the two theories are very different.
Scientists think that plants evolved directly from what kingdom?
Scientists believe that plants evolved directly from a freshwater green algae called charophyte. There are two different types of charophytes, coleochaetales and charales, which strongly resemble earliest land plants.
What are the two theories of capitalization?
The two theories of capitalization are as follows:- 1. Cost Theory 2. Earnings Theory
What are the theories of procreation?
Procreation is the creation of humans. There are two main theories: Creation - God created the world an all that's in it, including humans, and they reproduce thorough sexual intercourse; and Evolution - Darwin's theory that humans evolved over the years through natural occurrences and from the growth and development of monkeys and other creatures.
What are the names of two types of autotrophs?
chemoautotrophs-those organisms that make their own food by chemical means, ie. without light. literally chemical-self-nutrition photoautotrophs-those organisms that use light to produce food to feed themselves, ie. photosynthetic organisms. literally light-self-nutrition
Most group developmental change theories take one of two approaches?
recurring-phase theories and sequential-stage theories
