Ch 27

Animals are _____ organisms.

• Eukaryotic, multicellular, heterotrophic

• Prokaryotic, unicellular, autotrophic

• Eukaryotic, unicellular, heterotrophic

• Prokaryotic, multicellular, autotrophic

(a)   is unique to the animal kingdom.

• Absence of genetic material
• Single-celled structure
• Presence of differentiated tissues
• Ability to perform photosynthesis

Most animals undergo _____.

• Budding reproduction

• Binary fission

• Asexual reproduction

• Sexual reproduction

Hox genes are responsible for _____.

• Regulating water intake

• Mineral absorption from soil

• Photosynthesis processes

• Directing the organization of major animal body plans

Simpler animals generally display _____ symmetry.

• Spherical symmetry

• Radial symmetry

• Asymmetrical

• Bilateral symmetry

A coelom is (a)   .

• A limb regeneration factor
• A type of respiratory organ
• An internal body cavity
• External protective layer

Animals called triploblasts are _____.

• Animals with external skeletons

• Animals without any germ layers

• Animals with two germ layers

• Animals with three germ layers

The Cambrian explosion is known for _____.

• Formation of the first oceans

• Decrease in atmospheric oxygen

• Introduction of plant species

• Rapid diversification of animal species

Match the following data types with the correct usage in scientific research.

• Used in climate change studies

• Atmospheric composition data

• Used in agricultural studies

• Temperature data

• Used to create phylogenetic trees

• Soil composition data

• Used in climate modeling

• Morphological and molecular data

_____ marked the remainder of the Paleozoic Era.

• Appearance of new classes, families, and species

• Stabilization of global temperatures

• Reduction in biodiversity

• Emergence of modern human civilization