The presence of vertebral column or notochord at any stage of life in any organism is the characteristic of vertebrate.
Explanation:
An animal is vertebrate if it fulfils the following criteria:
Presence of vertebral column or notochord.
Presence of endoskeleton or backbone.
The spinal cord runs above the vertebral column.
Humans embryo has notochord which becomes a vertebral column.
The alimentary canals end in the anus.
Mouth is present ta the anterior side of the vertebrate.
Have legs, fins or wings for movement.
Presence of a nervous system and sensory organs.
Presence of skin, lungs or gills.
Presence of a circulatory system.
Vertebrates include fish, amphibians, reptiles, birds and mammals.
Answer:
Conclusion
Explanation:
When doing a science lab, the conclusion is the part at the end of the lab where you describe what you've learned and whether or not your hypothesis was supported by your results.
Sex (sexual reproduction), is the act of reproducing. Each species of animal and plant do it in a different way, and some just choose to do it by themselves. And yes, according to a good percent of the population, sex does feel good.
testes → sperm duct → glands → urethra → penis
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