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6th Grade Ch 6
Intro to Animals & Cnidarians
Question | Answer |
---|---|
the Animal Kingdom is divided into 35 different ___ | phyla |
Animal phyla can be classified into vertebrates or invertebrates based on ___ and ___ physical characteristics. | external; internal |
The characteristics of animals include | multicellular; heterotrophs,need to obtain food and oxygen for energy; maintain internal conditions, and reproduce. |
vertebrates | animals that have a backbone |
invertebrates | animals that do not have a backbone |
sponges | Very simple animals that have many pores (holes) through which water flows |
Water flows into a ___ ___ and out through a hole in the top of a sponge. | central cavity |
___ obtain food and eliminate wastes as water passes through their bodies. | sponges |
Sponges have specialized ___ for obtaining food and oxygen from the water. | cells |
adaptation | special structures that enable animals to survive in their environment. |
Adaptations allow animals to ___ themselves, to ___, and to obtain ___. | defend; move; resources |
Skin color or patterns allow an animal to ___ from or ___ a predator. | hide; warn |
Skin color can be used to ___ an animal. | camouflage |
Patterns can be used to ___ another animal. | mimic |
Animals can use horns, claws, quills, stingers, or venom to make a direct attack ___. | painful |
Some animals emit a strong ___ to prevent an attack from a predator. | smell |
Squid and octopus release a cloud of ___ to escape from predators. | ink |
exoskeleton | an external shell or skeleton that can be used for protection. |
omnivore | an animal that eats both plants and animals |
herbivore | an animal that eats only plants |
carnivore | an animal that eats other animals. |
spicules | sharp pointed structures that provide protection and support for sponges. |
spongin | fibrous material that provides support and protection for sponges. |
sessile | an organism that remains in one place for most of its lifetime. |
polyp | the vase shaped, sessile form of a cnidarian. |
medusa | bell shaped, free swimming form of a cnidarian. |