These vertebrates are unique in that they:
1.have skeletons made of cartilage
2.do not have jaws
3.lack appendages
4.lay amniotic eggs
2
You might also like to view...
The secretions of endocrine glands ____
a. only affect their own tissue b. provide feedback by paracrine action c. reach their target tissue via the ECF d. reach their target tissues via the circulatory system e. are only active in the nervous system
If we are analyzing the origin of new families, orders, etc. over time, we are studying
a. microevolution b. mutation c. macroevolution d. natural selection e. anagenesis
When the anticodon of a tRNA and the codon of an mRNA interact, the two sequences are
A) identical. B) antiparallel. C) parallel. D) not related.
Which type of species is most likely to go extinct?
a. underharvested b. endemic c. widely distributed d. generalist e. introduced