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2

@Munish: I will rebut that page, even if Mr. Blomstrom has begun to do so. Carnivores don't swallow food whole. That's why they have other teeth rather than just four large fangs. Birds have no teeth. There are many birds of prey that eat other animals, and there are birds that are nut/seed/fruit eaters. Stomach acid: we have an extremely strong acid ...


3

First, the correlation between canine teeth and carnivory isn't absolute. Gorillas have fearsome canines, and they're herbivores. Humans are the only primates capable of rotary chewing, thanks to our small canines. (Encyclopedia Britannica: Canine Tooth) Even with our small canines, some groups of humans live almost entirely on meat. However, humans are ...


2

Cells consist mainly of water and the compressibility of water is very low. Wikipedia states: The low compressibility of water means that even in the deep oceans at 4 km depth, where pressures are 40 MPa, there is only a 1.8% decrease in volume. This means that the pressure alone does not affect the size of the cells much. However, the pressure affects ...


2

The question is currently too broad and your list of species is rather unexpected! Important Concepts You probably want to learn about the concept of bioindicators Bioindicators are a species that can be used to monitor the health of an environment or ecosystem. They are any biological species or group of species whose function, population, or status ...


3

Top speed = 20 mph (32 kmh), according to a-z animals.


2

I believe a lot of these behaviours can fall under the umbrella term of reciprocity, or reciprocal altruism. In evolutionary biology, reciprocal altruism is a behaviour whereby an organism acts in a manner that temporarily reduces its fitness while increasing another organism's fitness, with the expectation that the other organism will act in a ...


0

It's only a partial answer, but a Nile crocodile can eat up to half its body weight at a sitting, according to National Geographic. Since few freshwater fish weigh half as much as a crocodile, we can probably assume these croc feasts occur when they're able to ambush ungulates (e.g. zebras and antelope). So one guess is that a crocodile feasts on ungulates ...


10

As a couple of counterexamples, species in the classes Symphyla (Pseudocentipedes) and Pauropoda within Myriapoda have 8-11 and 12 leg pairs respectively, so between 16 to 24 legs (sometimes with one or two leg pair stronlgy reduced in size). (species in Symphyla, from wikipedia) Another common and species-rich group with 14 walking legs (7 leg pairs) is ...


1

Yes, there are plenty of examples! We refer to this seeking behaviour as taxis. Taxis There are many types of taxis such as chemotaxis (attracted to chemical stimulus) or phototaxis (attracted to light). A complete list of taxis can be found on wikipedia > taxis. For the purpose of this answer I will restrict to chemotaxis only Chemotaxis (from chemo- ...


0

My initial guess (knowing almost no information) is that it's a Northern saw-whet owl (Aegolius acadicus). These owls live year round in Maine but also increase in number as some migrate from Canada through Maine for winter. You can hear their advertising song here. Northern Saw-whet Owls have a distinctive too-too-too call -- an insistent series of ...


5

Some animals do like; Ants prepare their meat not by heating but by marinating it with digestive enzymes to create a glistening protein slurry. With their hourglass figures, adult ants have such tiny waists that solid food can't pass through to their abdomens. Biologists already knew that the blob-shaped larvae predigest meat. Some scientists had suggested ...


4

Poison dart frogs have aposematic colouration, making them the exact opposite of camoflaged. They are also predators, since they feed on ants, termites and beetles.


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What is a predator? As discussed in the comments by @MarchHo and @AMR, there is discrepancy between the definition of predation in the biology literature and in the every day use. Population definition From the Oxford dictionary predation- The preying of one animal on others; the behaviour of a predator (predator n. 2); (also occas.) an instance of ...


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One of the comment to David's answer (which covers the history and reasons for spiderwebs in its two links) mentions a comparison between web patterns and molecular phylogeny. Not precisely that, but I found this article which opens up some interesting possibilities (I can delete this or turn it into a comment if you consider it too unrelated, please let me ...



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