25.1 what is an animal?
What is the notochord?
A long supporting rod that runs through the body just below the nerve cord
What do most chordates develop?
Backbone
What must be excreted, or eliminated from the body?
Carbon dioxide and ammonia
Phylum Chordata
Chordates are members of what clade?
What animals use several linked body systems to respond to events in their environment?
Complex animals, mammals
No
Do invertebrates form a clade?
What are the four characteristics that chordates exhibit?
Dorsal, hollow nerve cord; a notochord; a tail that extends beyond the anus: and pharyngeal pouches
When do most chordates have a notochord?
During the embryo stage
Negative feedback, a system in which the product or result of a process limits the process itself
Feedback inhibition
What are examples of vertebrates?
Fishes, amphibians, reptiles, birds, mammals
What is the excretory system used for?
For eliminating other wastes such as ammonia, concentrates or processes these wastes and either expels them immediately or stores them before eliminating them
Pharyngeal pouches may develop into what?
Gills used for gas exchange
Name a few characteristics that animals share
Heterotrophs, multicellular, kingdom animalia, eukaryotic organisms, lack cell walls
33 phyla
How many phyla do invertebrates include?
All animals that lack a backbone
Invertebrates
What essential functions must animals perform to survive?
Maintain homeostasis by gathering and responding to information, obtaining and distributing oxygen and nutrients, collecting and eliminating carbon dioxide and other waste, they also reproduce
What is the most important function of all body systems?
Maintaining homeostasis
What do phylum Chordata include?
Non-vertebrate chordates, which lack vertebrae
What does asexual reproduction reproduce?
Offspring identical to the parent
What is the pharyngeal pouches?
Paired structures in the throat region, also called the pharynx
Respond to sound, light, chemicals, and other stimuli
Receptors
What animals cannot excrete excess salt very well?
Reptiles, birds, mammals
What increases a species ability to evolve and adapt as the environment changes?
Sexual reproduction
How do most animals reproduce?
Sexually by producing haploid cells
What gathers information using cells called receptors?
The nervous system
Backbone
Vertebral column
Chordates with backbones
Vertebrates
Sea stars, worms, jellyfish, insects
What are a few examples of invertebrates?
Invertebrates
What are the largest taxonomic groups of animals?
95%
What is the percentage of animal that are invertebrates?
5%
What is the percentage of animals that are chordates?
Can invertebrates and vertebrates reproduce asexually?
Yes
