Biology 1402 - Exam 2

oviparous

Most fish deposit fertilized eggs, but some sharks keep the fertilized egg inside the female until she gives birth to a relatively well-developed pup. These sharks would thus be characterized as:

nervous tissue

Somites give rise to all of the following tissues EXCEPT:

The embryos would show no development of posterior regions

Suppose the protein specified by bicoid was injected into Drosophila embryos, so that a high concentration was present everywhere in the embryo. What might be the result of such an experiment?

homeotic genes

Suppose you found several Drosophila mutants that possessed additional wings growing out of their head segments. The probable mutation would be found in:

hemocoel

What kind of coelom or coelom-like cavity do arthropods possess?

195 million years ago

When did mammals first appear in the fossil record?

echinodermata

Which of the following animal groups is entirely aquatic:

crustaceans

Which of the following is considered a paraphyletic group for arthropods?

amniotic egg, jaw, and tetrapod limbs

Which of the following occurred in vertebrate evolution that allowed for animals to be more efficient at survival?

External Reproduction

Which of the following was NOT an adaptation required for protostomes to make the water to land transition?

fur

Which of the following would be a synapomorphy unique to mammals?

mammals

Which of the following would be considered a sister group to reptiles?

multicellularity

Which of the following would be the synapomorphy that classifies all animals into a monophyletic group?

acorn worm

Which of the following would not be considered a mollusk?

mitosis

Which one of the following processes in a developing embryo is a prerequisite for all of the other processes:

exchanging gases, locomotion, sensing the environment, and feeding

jointed appendages in arthropods are responsible for:

anterior

the axis that runs towards the head

foot

A cephalopod's tentacles are modified from its

gap genes

A mutation in which segmentation genes would result in the loss of a group of contiguous segments?

Water Vascular System

Echinoderms have a system of fluid-filled tubes and chambers that functions as a hydrostatic skeleton called

Mesoderm

In humans, excretory and reproductive system arise from which germ cell layer?