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1answer
35 views

What is this discarded exoskeleton from?

This morning I was looking round the garden and found this sticking out of a pit in patch of soil, next to the wall of the house (in a trough sort of thing). I came to the conclusion it must be part ...
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1answer
47 views

will an earthworm survive after covering its skin with a wet cloth

I am very curious about this question. I got this doubt when I was studying anatomy and physiology of the earthworm Lampito mauritii. It breathes through its skin (cutaneous respiration) and if we ...
7
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1answer
45 views

Is the number of legs in myriapoda determined entirely by the genome?

Myriapoda (comprising, among others, millipedes and centipedes) can have hundreds of legs (Illacme plenipes having up to 750 legs). Interestingly, the number of legs (or leg pairs) appears to differ ...
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2answers
57 views

Can jellyfish swim backwards?

Jellyfish use jet propulsion to move forward, according to http://earthsky.org/earth/how-do-jellyfish-swim. Otherwise, they drift with the ocean currents. Does this mean that, without the presence of ...
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0answers
51 views

Do invertebrates dream? [closed]

From Wikipedia: Studies have observed dreaming in mammals such as monkeys, dogs, cats, rats, elephants and shrews. There have also been signs of dreaming in birds and reptiles. Have there ...
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3answers
109 views

Are there echolocating insects?

Echolocation is the ability to obtain spatial information of the surroundings from echos generated by the animal. There are bats and other vertebrates that naturally use it. I was wondering if this ...
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1answer
86 views

What is the difference between these worms: Caenorhabditis elegans and Eisenia fetida?

I love worm composting (I use red wiggler worms), but wondering how similar or different the Caenorhabditis elegans and Eisenia fetida are?
5
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1answer
681 views

Do octopuses have better eyes than humans?

I've read that unlike humans, octopuses have eyes "designed" the "right way", i.e. with the nerve fibers behind the retina, thus getting rid of the blind spot we humans have as well as theoretically ...
7
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1answer
68 views

Which poison makes seastars inedible to possible predators?

In the new citizen science project (see: Sea Floor Explorer), numbers of seastars, scallops, crustaceans and other animals are counted. Already one can see a heavy bias in favor of seastars, both the ...