It is generally accepted that the vertebrates that evolved during the early Devonian period are the
A. dinosaurs.
B. hominoids.
C. sharks and bony fish.
D. mammals.
E. birds.
Answer: C
You might also like to view...
What is antigen presentation? Why is antigen presentation important for long-term immunity?
What will be an ideal response?
The first documentation of a viral infection causing oncogenesis was established with
A) Rous sarcoma virus in chickens. B) Epstein-Barr virus in Burkitt's lymphoma. C) hepatitis B in liver cancer. D) HIV in humans. E) human papilloma virus in cervical cancer.
American sycamore (Platanus occidentalis) and European sycamore (Platanus orientalis) are tree species that will interbreed if planted nearby but will not normally interbreed because they occur on different continents. This is an example of
A. mechanical isolation. B. temporal isolation. C. habitat isolation. D. behavioral isolation. E. gametic isolation.
Which of the following must occur for a malignant tumor to form?
1.proto-oncogene converted to oncogene
2.failure of tumor suppressor gene
3.both proto-oncogene converted to oncogene and failure of tumor suppressor gene
4.none of the choices