Questions tagged [vertebrates]

Question specifically regards vertebrates. Vertebrata is a Subphylum within the Chordata Phylum, and Animalia Kingdom. Vertebrates are animals with backbones and consist of 4% of the described animal species, and include mammals, birds, amphibians, reptiles, and several Classes of fish.

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Since frogs are ectotherms and supposed to have low metabolic rate, why do they grow so fast and eat so much?

It's always emphasized in literature that endothermy enables high growth rates but requires more food. But look at frogs, for example: bullfrogs, toads, pacman frogs etc. They would readily eat a ...
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How does fish breath under water? [closed]

How we will describe the whole mechanism of fish breathing under water? How they absorb oxygen and and then remove oxygen through a process known as gas exchange?
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1answer
65 views

Minimum number of clades needed to partition Vertebrates while maintaining Birds, Mammals, and Amphibians as distinct clades?

At school I was taught the Linnaean view of vertebrate life - that vertebrate animals consisted of 5 distinct groups: mammals, birds, reptiles, amphibians, fish. I learned later however that this was ...
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4answers
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Are humans Gnathostomates?

Gnathostomates are vertebrates having jaws. But when I search on the internet for Gnathostomates, I always find out that they are sharks and fish-like organisms. But are humans not also ...
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Are vertebrate wings and fins considered vertebrate limbs?

I have come across many articles which seem to suggest (but do not explicitly state) that limbs refer to arms and legs. My confusion stems from the fact that does the term vertebrate limb also include ...
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Are the 5 digits of all land vertebrates an accidental number? [duplicate]

All land verterbrates except some frogs have 5 fingers on hands and feet. The first vertebrate lizards came out of the water and had 7 fingers ( -370mn yrs), and then 6 fingers, and after 30 million ...
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1answer
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If an organism is supported only by cartilage, does it have an endoskeleton?

Lamprey and sharks lack bones, but does this mean they are not classified as having an endoskelton? Does an organism need bone to be considered as having an endoskeleton?
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Why were dinosaur skeletons so light compared to mammal skeletons?

I was watching a presentation by Dr. Jessica Theodor [1] who discusses (at 38:10), among other things, the skeletal structure of dinosaurs vs. mammals. "Dinosaurs have way lighter skeletons, which ...
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Skull mystery on beach

The skull was found on a beach on the Sechelt inlet on Canada's pacific coast. A marine environment. What species is this skull from?
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668 views

Why are vertebrae, specifically, so important in classification?

A fundamental level of animal classification is the distinction between vertebrates and invertebrates. The vertebrata are, arguably, often classified as higher life forms than the invertebrata. But ...
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3answers
574 views

Why are there splice variants within the same organism? What might contribute to the need for the feature?

I only know splice variants are produced by different combinations of introns and exons. I wish to know why there is a need of such function. Perhaps using the same amount of DNA sequence to produce ...
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1answer
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Which is the guideline to choose a molecular target to identify vertebrate hosts from arthropod bloodmeals?

There are some molecular targets to identify vertebrate hosts from arthropod bloodmeals including the Cyt b gene and the COI gene. Which are the standards or characteristics that I have to bear in ...
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The suspended cat clavicle

I know the clavicle of the cat floats freely as opposed to be attached as in humans. This is supposed to allow them to be able to squeeze through spaces, according to a quick google search. But how ...
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Difference between intervertebral and vertebral foramina

In the human spine, what is the difference between intervertebral and vertebral foramina? Is it just a matter of perspective and do they refer to the same thing or are they different?
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What is the smallest known organism with a skeleton? [closed]

See question title. After doing some looking around on my own I haven't found much so I figured I'd ask some experts.
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476 views

Why is venom more common in fish and snakes than other vertebrates?

Reading this question, I wondered why is it that we associate vertebrate venoms so often with snakes and fish, and more rarely with lizards, amphibians, mammals, and birds (apparently never, in birds?)...