Mollusca
What is the only cephalopod with an external shell?
Nautilus
Which of the following is true of arthropods?
They exhibit bilateral symmetry. They have a well-developed nervous system. They develop from 2 germ layers. They have a hard exoskeleton.
They exhibit bilateral symmetry. They have a well-developed nervous system. They have a hard exoskeleton.
Arthropods develop from 3 germ layers (triploblasts). Animals that develop two germ layers are called diploblasts. These animals have radial, biradial, or rotational symmetry, and have a nonliving middle layer between the endoderm and ectoderm.
True or False: Animals that are in Phylum Chordata have four similar characteristics which appear in all adult animals in this phyla.
FALSE
Crocodiles and alligators are members of the retilian order crocodilla. What is unique about them?
They have a four-chambered heart.
True or False: Both birds and mammals have some type of hair. EXPLAIN your answer.
False. Mammals have hair. Birds have feathers.
Class Cephalopoda: nautilus, cuttlefish, squid, octopus
Define cephalothorax and name an animal that has one.
Cephalothorax - A fused head and thorax segment.
chelicerates (classes Merostomata, Arachnida, and Pycnogonida), arachnids, and crustaceans
True or False: Animals that are in Phylum Chordata have four similar characteristics which only appear during various stages of their life cycle depending on the animal.
TRUE
Newts and salamanders are members of the amphibian order urodela. What is unique about this order?
Most members do not have lungs.
THIS IS YOUR FREE SPACE.
COLLECT 200 points
Define mantle and explain its function.
In mollusks - Mantle: specialized tissue that lines the inside of the shell and secretes new shell material.
In Cephalopods - Mantle is an outer body wall covering the visceral hump. It constricts, trapping the water inside their body. [Water can exit quickly through a funnel below their head allowing them to move via jet propulsion.]
Characteristics of subphylum crustacea:
_____ eyes, ____ antennae, ____ body segments, ____ legs
compound eyes, 2 pairs of antennae, 2 body segments, 10 legs
The gill covering is called the operculum and is a structure on bony fish.
Air exchange in adult amphibians primarily happens through ______.
Air exchange in all reptiles happens through _____.
Air exchange in adult amphibians primarily happens through their skins.
Air exchange in all reptiles happens through the use of lungs.
Define hallux.
A hallux is a backward facing toe used for grasping.
Define nacre.
Nacre: secreted in thin layers coating irritants or parasites inside the shell, creating a pearl over time.
Name 2 animals in group chelicerates.
Chelicerates: spiders, ticks, and scorpions
Define notochord.
A flexible and rod-shaped structure what provides support.
Tuataras are members of the reptilian order ________. What is unique about them? (two answers)
order sphenodontia
They have a third eye on the top of the their head.
True or False: Mammals have adaptations for maintaining constant body temperature, including planting to release heat, a layer of blubber to keep warm, large ears for releasing heat, and waving of hair to keep warm. EXPLAIN your answer.
False. Waving of hair is not a warming adaptation.
In cephalopods, the radula moves the food to their esophogus.
Characteristics of animals in class arachnida:
____ [type] eyes, ___ [number] antennae, ____ [number] legs, ____ [number] body segments
Arachnida have simple eyes, no antennae, 8 legs, 2 body segments
Define slime glands and name the animal that has them.
Slime glands: release mucous that allows them to escape the grip of predators more easily. Hagfish have slime glands.
True or False for each of these:
1. Fertilization in reptiles occurs internally.
2. Reptilian shells are leathery, not hard.
3. Reptiles are amniotes.
4. All reptiles only reproduce sexually.
1. True
2. True
3. True
4. False
Name two non-placental mammal groups.
Marsupials and monotremes.