53 Answered Questions for the topic Evolution

10/16/19

Help please?! Open ended... Natural Selection sceanario

Over the past several years, Abalone has come into style for making jewelry, and have therefore been over harvested. As the population of abalones declined, so did the sea stars that eat them.... more

09/26/19

DDT and insects

DDT was once considered a ‘silver bullet’ that would permanently eradicate insect pests. Today, instead, DDT is largely useless against many insects. Describe in specific scientific terms, applying... more

07/31/19

Why have humans evolved much more quickly than other animals?

Humans have, in a relatively short amount of time, evolved from apes on the African plains to upright brainiacs with nukes, computers, and space travel. Meanwhile, a lion is still a lion and a... more

07/31/19

Is scalable growth the main reason why Darwinian systems select Fibonacci sequences?

The other day I was thinking about evolution of multi-cellular organisms, and why from the earliest onset of the development of communal cellular structure building, life may have selected a... more

07/29/19

Are there any multicellular forms of life which exist without consuming other forms of life in some manner?

The title is the question. If additional specificity is needed I will add clarification here.Are there any multicellular forms of life which exist without requiring the consumption (destruction) of... more

07/24/19

Are humans the only species who drink milk as adults?

I was drinking a glass of milk the other day and that got me thinking that no other animal to my knowledge drinks milk past their infant stages. One could argue that cats might but it isn't good... more

07/23/19

How did viruses learn to utilize the workings of a cell?

This is my first post here, so excuse me for its simplicity.Viruses can infiltrate a cell, overtake it and multiply. It has projecting fibers whose ends are shaped as kind of a "key" to a mobile... more

07/18/19

Why did Fair Meiosis evolve?

How and why did Fair Meiosis evolve? I can hardly think that it provided a fitness advantage to the individual carrying the mutation. Why would it? Or did it evolve through lineage selection? Or... more

07/14/19

Why do plants have green leaves and not red?

I know plants are green due to chlorophyll. Surely it would be more beneficial for plants to be red than green as by being green they reflect green light and do not absorb it even though green... more

07/08/19

Does the genome make sense without knowledge of the ovum?

Much of the literature for laypeople seems to consider (and to spreadthe idea) that an animal (or a plant, I guess) is characterised by itsgenome. I do not know whether the same goes for more... more

06/28/19

why is AUG the initiation codon?

Is there any reason why AUG is the initiation codon ?Why is there a need for an initiation codon ? Can't translation start with different codons?

06/27/19

Why is polyploidy much more common in plants than in animals?

There are very few animals with polyploidy like salamanders. Why is it that polyploidy is so uncommon in animals? On the other hand there are numerous examples of polyploid plants. If ut something... more

06/25/19

Is it known how the first viruses formed?

[The oldest known virus](http://www.livescience.com/16015-oldest-viruses-insects.html) is known to have infected prehistoric insects 300 million years ago. A virus is basically a parasitic strand... more

06/23/19

How can fruit flies and mice share the same gene that says to build an eye if they evolved separately?

I saw a documentary where they inserted the gene of a mouse that basically is the starting "build an eye" command into a fruit fly, and a fruit fly eye grew. My question is, if eyes of different... more

06/20/19

Height and natural selection in humans?

I watched the documentary "Evolve" recently and in the segment on "size" Scott V. Edwards, Harvard evolutionary biologist mentioned the idea that humans might evolve to be 7' tall in 'hundreds of... more

06/17/19

Why do we have five fingers?

Humans (and other humanoid mammals) have five fingers in each hand. Curious to know, why five? Wouldn't more fingers be more useful? Is there any evidence that it used to be different and natural... more

06/16/19

Why is the strength of genetic drift inversely proportional to the population size?

I saw a concept on the Internet that says "the strength of genetic drift is inversely proportional to the population size". I don't know why they are **inversely proportional**? Can somebody... more

06/09/19

Why would lethal genes evolve?

I've been reading through 'The Selfish Gene' by Dawkins. At a few places in the book he states that incest is damaging because it would give a very high chance of lethal recessive genes becoming... more

06/08/19

Randomness in living systems?

The point of my question is not to talk about events that are uncontrolled by living organisms. My question is about controlled randomness, or I'd like to say adaptive random process. Process that... more

06/08/19

How did the cardiovascular system evolve?

How has evolution created our blood, lungs and the heart?We can't exist without blood, which transports the oxygen to all areas of our body. However, the blood needs a lung, which gives it the... more

06/07/19

How can the number of genes increase through evolution?

I am aware of the basics of evolutionary theory, however I don't understand how mutations can add genes over time. Am I correct in thinking that creatures within the same species who mutate to have... more

06/06/19

Human evolution: Where *exactly* did the first human come from, whose parents were not?

Layman here. So I have never really quite understood this facet of human evolution, (or any other for that matter), in that, I understand the evolutionary process, but I get lost on the 'border'... more

06/04/19

What came first? The DNA or the DNA polymerases?

I know this sounds a lot like chicken and egg question and while the latter has an answer, I am intrigued about the former.A modified form of the question would be, in the course of abiogenesis,... more

05/31/19

Why and how does complexity usually tend to increase through time?

The question of complexity is classic in the very first lectures of evolutionary biology where the teacher usually tries to tell the students that complexity does not necessarily increase and that... more

05/29/19

How did genome duplication in jawed vertebrates allow gene specialization?

I am currently reading from Chapter 15 in Principles of Life, 2nd Edition:>Many gene duplications affect only one or a few genes at a time, but in some cases entire genomes may be duplicated.... more
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