The most important feature that permits a gene to act as a molecular clock is ________.

TLS Online TPP Program

#Question id: 8923

#Unit 9. Diversity of Life Forms

Which of these genetic processes may be most helpful in accounting for the Cambrian explosion?

TLS Online TPP Program

#Question id: 8925

#Unit 9. Diversity of Life Forms

What is the probable sequence in which the following clades of animals originated, from earliest to most recent?

1. tetrapods

2. vertebrates

3. deuterostomes

4. amniotes

5. bilaterians

TLS Online TPP Program

#Question id: 8927

#Unit 9. Diversity of Life Forms

Arthropods invaded land about 100 million years before vertebrates did so. This most clearly implies that

TLS Online TPP Program

#Question id: 8928

#Unit 9. Diversity of Life Forms

An adult animal that possesses bilateral symmetry is most certainly also

TLS Online TPP Program

#Question id: 8930

#Unit 9. Diversity of Life Forms

Soon after the coelom begins to form, a researcher injects a dye into the coelom of a deuterostome embryo. Initially, the dye should be able to flow directly into the

TLS Online TPP Program

#Question id: 8932

#Unit 9. Diversity of Life Forms

What is the correct sequence of the following four events during an animalʹs development?

1. gastrulation

2. metamorphosis

3. fertilization

4. cleavage