42 votes

Are there life forms that freely fly in the atmosphere?

It sounds like you are talking about aeroplankton, a general term for a wide range of tiny life-forms borne on the wind. While some of these are essentially passive while airborne (e.g., pollen, ...
jakebeal's user avatar
  • 6,977
25 votes
Accepted

Can 'human' become a genus due to space colonization?

The concept you are referring to is speciation and it has been well studied in a wide variety of different natural organisms. I suppose here we are talking about the biological species concept. The ...
user438383's user avatar
  • 2,351
22 votes
Accepted

What are the environmental conditions for SARS-CoV-2 to survive?

Because "any" Coronavirus is so dangerous, much research have been done on viruses with similar properties. They are called "surrogates". Because nCoV is new, we don't have any studies, so we need to ...
not2qubit's user avatar
  • 1,219
17 votes

Antibacterial soap impacts on septic system?

The quick answer is: Yes, it can cause harm. Think about it...The septic system (both the tank and your drain field) rely on bacteria, and antibacterial soap is not designed to kill only specific ...
theforestecologist's user avatar
12 votes
Accepted

Does rainwater contain many fewer micro-organisms than river water?

According to a number of citations listed on Kenyon College's MicrobeWiki, rain can contain microorganisms via a process called "bioprecipitation." Essentially, microorganisms, dust and other small ...
theforestecologist's user avatar
10 votes
Accepted

Darwinism and the idea of being too successful

Photosynthesis. early photosynthesizers, which would have been adapted for a reducing atmosphere, drove themselves extinct as they dumped oxygen into the atmosphere as a waste product. They were ...
John's user avatar
  • 14.7k
9 votes
Accepted

Are there any animals that maintain white fur year round?

Polar bears (Ursus maritimus) have white fur all year long. There are probably several other examples. @L.Diago gave sheep as example. There are also all white troglodyte species.
Remi.b's user avatar
  • 68.1k
6 votes

Can 'human' become a genus due to space colonization?

I do not believe it will happen. There are multiple roadblocks: First, speciation time is measured in generations, not years. The human generation time is long, the 3000 generations mentioned in ...
Loren Pechtel's user avatar
5 votes

Questions about "parasite recursion"

Hyperparasitism is one possible term. According to the linked article it is commonplace in certain types of insects, but also in fungi. Apparently the cases of at least three levels are known: a ...
Roger V.'s user avatar
  • 3,852
4 votes

What causes plants in the prunus genus to reach anthesis?

Here’s how it works. Every morning when the sun breaks over the horizon — no matter what time of year it is — a clock starts ticking inside the trees. After a specific number of hours, the plants’ ...
Sartoaster11's user avatar
4 votes

Have there ever been as many mammals as there are now?

There can be perhaps 10 trillion rodents and bats on the planet, so the humans and livestock probably are small compared to a rainforest rodents and bats. The biggest bat colony is 40 million, they ...
bandybabboon's user avatar
  • 10.4k
4 votes

How is mankind important to nature?

The classical division of humans and animals has always been self-centered and artificial. Humans are animals, competing with other organisms under exactly the same rules. Evolution involves trade-...
Karl Kjer's user avatar
  • 7,663
4 votes

Why is Carbon Dioxide a Greenhouse Gas whereas Ammonia is not?

This is better suited for the Chemistry site, but there are two reasons. 1) The gas allows visible light to pass, but blocks infrared. (Which has to do with the nature of the bonds between atoms &...
jamesqf's user avatar
  • 3,643
4 votes

When do invasive species become native species?

Invasive species is defined by the USDA as: non-native (or alien) to the ecosystem under consideration and, whose introduction causes or is likely to cause economic or environmental harm or harm to ...
E Tam's user avatar
  • 842
3 votes
Accepted

Roughly speaking how stable are short sections of single-stranded RNA in exposed environments compared to double-stranded DNA?

The main difference in stability is due to the very high amounts of RNase in pretty much all fresh biological materials. Naked RNA is easily degraded by just touching it with skin. The first step in ...
Polypipe Wrangler's user avatar
3 votes

What are the negative consequences of a narrowed biodiversity to the planet?

From an ecological sense, cycles of living beings are intertwined. Breaking cycles affects life being able to live, reproduce, and die in a manageable way. Insects, animals, and plants help feed each ...
Alex Reynolds's user avatar
3 votes

Why does evolution not make our life longer?

I am assuming that by longer life, you mean slower aging, because evolution can do little if a mountain falls on a person! So, why don’t organisms have slower, or better, zero rate of aging? The ...
Prem's user avatar
  • 280
3 votes

Why does the SARS-CoV2 virus not remain infectious forever? Or does it?

Would it help to think a little differently? Rubber bands (for example) aren’t alive either, but there are several ways they can be destroyed, including physically pulling them apart or just by having ...
Laurel's user avatar
  • 793
3 votes
Accepted

What are the environmental conditions for larval Haemonchus contortus to survive?

Lowest temperature 2, 3, 4 and 5 week beakers containing eggs and non-infective larvae in lamb faeces didn't develop into infective larvae (L3) when exposed to fluctuating temperatures ranging from -1 ...
pawelek zzz's user avatar
  • 1,087
3 votes

Are there life forms that freely fly in the atmosphere?

Apparently yes. Caveat: the experimenters are are potentially biased because they believe in panspermia (the idea that life came to Earth from outer space), which is clearly fringe. However, I don't ...
Allure's user avatar
  • 537
3 votes
Accepted

How do animals that live in dens keep the dens from flooding?

this depends a lot on the animal but generally the shape or location of the den. Simply don't build dens in places prone to flooding, otherwise the shape of the den works. Foxes for instance which do ...
John's user avatar
  • 14.7k
2 votes
Accepted

How much carbon does a forest contain?

There are some well established methods for this. For example, estimating forest C stocks and fluxes is done for national C accounts which are used by the Intergovernmental Panel on Climate Change (...
nicfit's user avatar
  • 138
2 votes

How much carbon does a forest contain?

This question is very broad and this would require a lot of calculations, I will focus on the carbon dioxide in the trees, hopefully some other users can add details in respect to the organism and ...
KingBoomie's user avatar
  • 2,380
2 votes

How does eutrophication yield lower levels of dissolved oxygen?

From Wikipedia: Eutrophication arises from the oversupply of nutrients, which leads to over growth of plants and algae. After such organisms die, the bacterial degradation of their biomass consumes ...
theforestecologist's user avatar
2 votes

Are there any oxygen loving bacteria?

It's not true that all bacteria hate oxygen. Actually, there are some obligately aerobic bacteria that need oxygen to carry out cellular respiration. A notorious example of this type of bacteria is ...
Macrophage's user avatar
2 votes
Accepted

How are epiphytes symbiotic?

It's important to note that not all symbiotic relationships must be expressed in terms of a positive-negative (parasitism) or a positive-positive (mutualism) framework. I would guess that most tree ...
NatWH's user avatar
  • 940
2 votes

What is the meaning of "within-season variation"?

"Within-season variation" may be referring to one of two things (depending on the context): More commonly: the variation of a variable within a given season (i.e., between months or days within that ...
theforestecologist's user avatar
2 votes
Accepted

Why are Aardvarks capable of burrowing given their size?

The following paper examines the link between burrowing ability and the stress and strain resistance provided by increased endosteal tissue formation (specifically compacted coarse cancellous bone (...
brazofuerte's user avatar
  • 1,582
2 votes

How deep could a human swim with SCUBA apparatus?

As far as I can find the current world record for "scuba" diving is 1,090 ft 4.5 in set in 2014. The previous record was 1,044 ft set in 2005 so (as with most human endurance & physical ...
Pelinore's user avatar
  • 801

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