Quiz - 24.1: Intro to Animals

Suppose you found an orchid mantis. What characteristics would you look for to determine that the organism is an animal? Select the one INCORRECT answer.

• The cells contain a membrane-bound nucleus.

• The organism depends on other organisms for nutrition.

• The organism has cell walls, rigid structures that provide support and protection

• The organism is multicellular, composed of cells that perform specific functions

____________ include all animals that lack a vertebral column, such as worms, insects, and snails.

• vertebrates

• invertebrates

• chordates

• nightcrawler

At some point in their lives, all ______________ have a dorsal, hollow nerve cord.

• vertebrates

• invertebrates

• chordates

• nightcrawler

Chordates also have a tail that extends beyond the anus, and ___________ that may develop into gills.

• pharyngeal pouches

• a nerve cord

• chordates

• digestive tract

Most chordates—including fishes, amphibians, reptiles, birds, and mammals—are vertebrates that develop a(n) ____________.

• exoskeleton

• backbone

• cell wall

What is the name of structure #6?

• muscle segments

• notochord

• nerve cord

• pharyngeal pouch

When an animal’s body temperature becomes too high, the animal may release water onto its skin as sweat. The sweat evaporates to cool the skin. Sweating is an example of what type of process?

• positive feedback regulation

• maintaining homeostasis

• disturbing homeostasis

• sensory neuron regulation

Which animal body systems may be involved in homeostasis?

• only the circulatory system

• only the circulatory system and respiratory system

• only the nervous system and endocrine system

• all body systems

During the blastocyst stage of embryonic development, the embryo is organized into three germ layers: endoderm, mesoderm, and ectoderm. How does each germ layer develop as the embryo grows?

• Each germ layer produces specific body tissues and organs.

• The three germ layers fuse together, and the united germ layers produce all body tissues and organs.

• The endoderm and ectoderm are shed, and the mesoderm produces all body tissues and organs.

• The mesoderm provides nutrients for the embryo, and the endoderm and ectoderm produce all body tissues and organs.