Bio - Animals

The most physically diverse kingdom of organisms consists of...

• plants

• Animals

• Archaea

• Fungi

Animals that eat other organisms to gain the nutrients they need to survive are called

• Heterotrophs

• diploid

• Multicellular

• Eukaryotes

The set of inherited characteristics that all animals shares includes

• Rigid cell walls holding cells in place

• Both haploid and diploid stages

• Chloroplasts that make food

• Extracellular collagen networks

What do homeotic genes control?

• Development of collagen structures

• Asexual reproduction by budding

• Early development in animals

• Adaptation to specific niches

Animals that reproduce are diploid, meaning that they have one set of

• Hox genes from each parent

• Homeotic genes

• Chromosomes from each parent

• Sexual organs

In what way can animals with bilateral symmetry be divided?

• Equally along only one plane

• In a spiral pattern

• Equally along two planes

• Around a central axis

The Cambrian explosion, which led to a diverse set of body plans, was possible only because....

• Every animal phylum had its own body plan

• Animals had already evolved hox genes

• All animals had three layers of tissue

• Both bilateral and radial body plans existed

Animals with three layers of tissue are

• Ectodermal

• Endodermal

• Mesodermal

• Triploblastic

In protosomes, first the mouth is formed, and then the

• Legs

• Gut

• Anus

• Brain

What characteristic is unique to vertebrates?

• An internal segmented backbone

• A hard exterior shell

• The presence of wings

• A soft internal backbone