Answer:
1.autotrophs
2.both autotrophs and heterotrophs
3.heterotrophs
4.autotrophs
5.autotrophs
6.both heterotrophs and autotrophs
Explanation:
Answer: They have well-defined skeleton.
Explanation:
This is because the vertebrates are uniquely characterised by the presence of the bones.
Hope this helps a little :)
An invertebrate animal of the large phylum Arthropoda, such as an insect, spider, or crustacean.
