Introduction to Animal Diversity 1

More than a _____ living species of animals have been identified

• million

• billion

• trillion

• quadrillion

Of the living species that have been identified, about 95% of them are _____

• invertebrates

• vertebrates

• acoelomates

• coelomates

All animals are _____

• multicellular

• unicellular

• colonial

• prokaryotic

All animals are _____

• eukaryotic

• unicellular

• colonial

• prokaryotic

All animals are _____

• heterotrophs

• autotrophs

• mixotrophs

• phototrophs

_____ are flagellated

• sperm

• eggs

Sperm are _____, which means they possess long tails that beat rhythmically to propel them through their journey to fertilize the egg

• flagellated

• blastulated

• gastrulated

• radiated

Most animals reproduce _____

• sexually

• asexually

In most animals, the _____ stage usually dominates the life cycle

• diploid

• haploid

• monoploid

• triploid

____ cells contain twice the DNA of _____ cells

• diploid; haploid

• haploid; diploid

• monoploid; triploid

• triploid; monoploid