Animal Development, Diversity, and Behavior

Types of postzygotic barriers include:

• Reduced hybrid viability

• Mechanical isolation

• Gamete isolation

• Reduced hybrid fertility

• Hybrid breakdown

The type of speciation that occurs with the presence of a geographical barrier, which in turn induces reproductive isolation, is called (a)   speciation.

All animals are:

• Heterotrophs

• Autotrophs

• Carnivores

• Multicellular

• Diploids

During the stages of development for the zygote, after multiple mitotic divisions take place during the cleavage stage, what is formed?

• A gastrula

• A blastula

• Ectoderm and endoderm

• Mesoderm

The phylum Arthropoda contains which of the following organisms?

• Jellyfish

• Lobsters

• Giraffes

• Hydra

• Spiders

The phylum Echinoderm contain which of the following organisms?

• Apes

• Butterflies

• Sea stars

• Hydra

• Sponges

The phylum Annelid contain which of the following organisms?

• Flatworms

• Roundworms

• Earthworms

• Sponges

• Sea slugs

All fish, amphibians, mammals, reptiles, and birds have which of these in common?

• A notochord

• Pharyngeal pouches

• Alimentary canal

• Amnion

• Post-anal tail

What is the "internal clock" within your body that regulates your sleep-wake cycle called?

• Stimuli

• Circadian rhythms

• Hormones

• Innate behavior

• Fixed-action behaviors

The chemical substances that regulate animal communication over distances through odor or taste are (a)   .