What would you like to do?
Answer: Evolutionary BiologyEvolutionary Biology is the study of how cellgroups have changed tissues in animals in order to adapt to the climate, and how different tissues cam…e together in order to create new organs for that animal. Evolutionary biology is the study of how organisms evolve in response to changing variables in the environment, as well as how things are related to each other.
Molecular evolutionary biology, Population genetics, Genome studies of species, Fossil studies
They are tetrapods.
An evolutionary innovation associated with amphibians is their heart, which can exchange gases outside of a water environment. This allows the amphibians to live on land.
Charles Robert Darwin.
changes in genes within and among populations
Simply, adaptions. Think increased human intelligence over eons.
They are tetrapods.
Paleontology is the study of prehistoric life, including organisms' evolution. By studying paleontology, scientists learn about evolution, therefor contributing to evolutionar…y biology.
Because the fossils tell the long tale of the ever evolving organisms of the earth, their common ancestry; the unity and diversity of life.
Embryos are studied because they show the wonderful similarity that all species have when they are in utero (in the womb). We all start out with similar features, such as a ta…il, and as our genetic codes trigger certain cells to grow and others to replicate, we gradually develop into our specific species. Embryos show a common pattern of development that help to give evidence to the fact that we evolved from a common ancestor, though all that remains to show of that common lineage is so radically altered as we develop into infants and then adults.
Evolution is the change in allele frequencies in a population over time. In layman's terms, this means that it is the changes that appear over subsequent generations. It exp…lains the diversity of life we see on Earth.
If gayness is inborn, then it would be reasonable to assume there are evolutionary advantages for it. A gay sexual orientation doesn't mean a person cannot reproduce with memb…ers of the opposite sex. It just means that they don't want to do so. It is possible that as the world becomes more crowded and polluted, there might be a mechanism at work to help curb the population. That would in turn help keep the population and genetic stock healthy. Grown gay children can play a role in helping take care of pregnant or aging mothers when the rest of the family is busy with their own lives. One hypothesis is that there is a gene to cause an increased attraction to men in anyone with the gene - male or female. That has an evolutionary advantage since females are the ones who limit reproduction, and many don't want children or a family. Female humans often only carry a single child at a time, and it takes 8-9 months. Then they have to take care of the baby, and sometimes it takes a year or so after giving birth for fertility to return. It should also be noted that recent research has shown that some genetic factors that are associated with (although possibly not directly causal to) homosexuality in men affect the average fecundity in females as well. In other words, the same genes that increase the chances of homosexuality in men may also increase the chances of women having more children. So a gene to increase sexual attraction to men would have an advantage in terms of evolution. Such a gene would have the price of causing men to be more attracted to other men. However, not everyone would have such a gene, and men are prone to have multiple female partners, so a loss of some procreating men to gayness would not noticeably affect population. Some of this is social more than biological since the more privileged a society becomes, the more their views tend to shift politically to the Left, thus allowing more acceptance for gay sexual behaviors. So it is a self-limiting population mechanism.