No. Crocodilians are reptiles. and they are vertebrates, meaning they have a backbone. The answer is Lamprey.
Living in herd is a structural adaptation.
There are three different kinds of adaptations: behavioural, physiological and structural.
Adaptations help animals survive and their ecosystem.
The second sentence does not sound correct but it seems correct to me (just not in grammar).
Hope it helped!
B. mammary glands and hair or fur. things also to classify: feed milk to young, give birth live, and breathe in air, so they have lungs.
Complementary mRNA strand would be the following:
AUCAUCAUC.
3 Repeating codons of AUC, on the mRNA strand.
Organization is not a characteristic of life
