Linked Questions

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1answer
473 views

Viruses. Alive or Not? [duplicate]

I saw this fascinating article today about how HIV moves through a mouse host in real time. http://www.engadget.com/2015/10/02/watch-hiv-spread-through-mouse-in-real-time/#continued It's common to ...
0
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0answers
148 views

Are viruses technically organisms, or not? [duplicate]

Are viruses technically organisms or not? A quick Google search query for the term; are viruses organisms?, reveals various conflicting and somewhat inconclusive ...
1
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0answers
95 views

Why is a cellular structure necessary to satisfy the definition of alive? [duplicate]

I was looking at this image and reading through the Wikipedia page for viruses and it says that to satisfy the definition of "being alive" the organism must have a cellular structure, but it seems to ...
0
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1answer
51 views

What characteristics do living organisms (like humans or plants) have that viruses don't? [duplicate]

I am not too sure if viruses are considered living organisms. I learned that living organism: -Change their size -Reproduce -Heal themselves -Need energy (by eating) -React to the environment -...
0
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0answers
16 views

Why are viruses considered to be non-living? [duplicate]

Viruses are widely known as disease and illness-causing agents that can spread quickly through living organisms. They are considered to be non-living due to their unique characteristics.
3
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3answers
13k views

Why are viruses considered microbes?

My question is simple. Why is a virus considered a microbe? Considering a microbe is considered to be a "living" unit of life, which viruses are not.
29
votes
1answer
1k views

How did viruses come to be?

My question is out of curiosity and got me thinking. How did viruses with the head, tail and tail fibres actually evolve? These viruses look more like machines than biological entities. Are there any ...
4
votes
2answers
506 views

Changing the definition of life?

Viruses at this period of time do not fit the current definition of life. Much of the reasoning behind this is that we currently believe that all life must be made up of cells. Also, many biologist/...
-2
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1answer
7k views

Why are plants classified in living things? [closed]

@Volunteers Beware that I am none of the biological magnates. Nor a philosopher. This is just a sign of curiosity. And, I want only an intuition that enables me to see the difference. As far as I ...
14
votes
1answer
2k views

Which biological kingdom comprises the greatest biomass on Earth?

Which of the five biological kingdoms - animalia, protista, plantera, monera, or fungi - has the largest biomass? To clarify, if the biomass of every species in each of these kingdoms was added up, ...
1
vote
1answer
4k views

Are mitochondria alive? [duplicate]

I'm working on an assignment for my IB biology class and some assistance would be highly appreciated. I've read several articles and I still haven't quite gotten the answer I'm looking for. I have to ...
0
votes
3answers
277 views

Are seedless fruits considered life? [closed]

From school, I remember that for something to be considered life, it must be able to reproduce. With the creation of seedless fruits (such as watermelon), would this be considered life as they don't ...
8
votes
1answer
237 views

Viruses selected by evolution

First let me apologize in advance for I know almost nothing about biology. I had a conversation today with a family member who is a bio-computer-scientist and he talked to me about what his colleagues ...
1
vote
2answers
333 views

How likely is it that Earth has millions of different species?

I know that the probability of life existing on a habitable planet is pretty slim. But, how likely is it that it hapenned millions of times in the same planet? Or was it only a few species that ...
1
vote
2answers
436 views

Are there any alternatives to DNA as the hereditary material on Earth?

I wonder are there hereditary materials other than DNA deoxyribonucleic acid (may be on different planets). In addition, I learned in my high school that carbon and silicon are similar. Is it ...

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