The firsy one does both oxygenated and deoxygenated blood use the umbilical artery
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Animals, fungi, plants, even bacteria can be considered fossils. Two features that classify an archaeoptericus as a reptile would be its long bony tale and a full set of teeth. Comparing to a bird, this creatures exhibits long feathered wings and claws.
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https://study.com/academy/answer/what-joint-is-formed-between-the-ulna-and-radius.html
The best and most correct answer among the choices provided by your question is the first choice or letter A. <span>A biological agent that cannot reproduce on its own is a VIRUS.
</span>A virus<span> is a small infectious agent that replicates only inside the living cells of other organisms.
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