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Found Vertebrates 34 times.

Displaying results 1 to 10.

1. Amniote egg
An egg with compartmentalized sacs (a liquid-filled sac in which the embryo develops, a food sac, and a waste sac) that allowed vertebrates to reproduce on land.

2. Amphibians
Class of terrestrial vertebrates which lay their eggs (and also mate) in water but live on land as adults following a juvenile stage where they live in water and breathe through gills. Amphibians were the first group of land vertebrates; today they are mostly restricted to moist habitats.

3. Antibiotics
Substances produced by some microorganisms, plants, and vertebrates that kill or inhibit the growth of bacteria.

4. Appendicular skeleton
The bones of the appendages (wings, legs, and arms or fins) and of the pelvic and pectoral girdles that join the appendages to the rest of the skeleton; one of the two components of the skeleton of vertebrates.

5. Axial skeleton
The skull, vertebral column, and rib cage; one of the two components of the skeleton in vertebrates .

6. Birds
Taxonomic class of terrestrial vertebrates that are characterized by endothermy and feathers; descended from some group of reptiles (or possibly dinosaurs).

7. Carnosine
A molecule normally found within the muscle tissue of vertebrates. Carnosine is composed of two amino acid s, Beta- alanine and histidine , joined together with a peptide bond (a dipeptide).

8. Circulatory system, closed
A system that uses a continuous series of vessels of different sizes to deliver blood to body cells and return it to the heart; found in echinoderms and vertebrates .

9. Circulatory system, open
A system in which the circulating fluid is not enclosed in vessels at all times; found in insects, crayfish, some mollusks, and other invertebrates.

10. Convergent evolution
The process where two unrelated structures in unrelated organisms evolve to perform similar functions. (The structures are called "analogous structures.") For example, the wings of bats, birds, and insects evolved separately from each other but all are used to perform the function of flying. For another example, the complex eyes of vertebrates, cephalopods (squid and octopus), cubozoan jellyfish, and arthropods (insects, spiders, crustaceans) evolved separately, but all perform the function of vision.

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