Question

1. what group were the first primates?

a. prosimians b) cetaceans c) anthropoids d) old world monkeys d) simians

2. not a derived feature of birds

a. toothless b. small gonads, simple ovary c. hollow or honeycombed bones d. keratinized feathers derived from skin scales e. jaw joint bones (incus, malleus incorporated in inner ear

2. why is an amniotic egg an important evolutionary breakthrough?

a. permits internal fertilization to be replaced by external fertilization b. has shell that increases gas exchange c. prolongs embryonic development and juvenile stages d. provides insulation to conserve heat for embryo to develop e. independence from aquatic environment for embryo and juvenile stages

3. when australia isolated early on as pangea broke apart shows

a. diversity of eutherians b. split between reptiles and mammals c. origin of birds d. lack of eutherians e. origin of monotremes

4. correct sequence from oldest to most recent for origins of novel traits in chordate lineage?

a. pharyngeal slits, vertebrae, jaws, lungs, tetrapod, amniote egg, milk

b. vertebrae, pharyngeal slits, jaws, lungs, tetrapod, amniote egg, milk

Answer 1

1. a, prosimians

2. e, jaw joint bones

2. e, independence from aquatic environment for embryo and juvenile stages.