Test 3 Flashcards
In animals that display indeterminate development…
Early embryonic cells, if separated from the embryo, can develop into complete organisms
Protostomes develop through ___.
Spiral cleavage
A biologist discovered a new animal. Upon studying embryonic development, she observed spiral cleavage with the blastopore developing into a mouth. The animal was categorized as a ___.
Protostome
In which phylum of marine animals did symmetrical body plans first evolve?
Cnidaria
All of the following features are associated with bilateral symmetry in animals except…
Being sessile
Circulatory systems solved the problem of ___ in animals with coeloms.
The barrier to diffusion created by tissue surrounding the gut
Solid worms that lack a body cavity are known as ___.
Acoelomates
Which of the following is not true about animals?
They were some of the first organisms on the earth.
Which is the following terms is mismatched with its meaning or characteristics?
Diplomatic - ectoderm and mesoderm
Diplomatic
Ectoderm and endoderm
Triploblastic
Ectoderm, mesoderm, and endoderm
Parazoa
Lack symmetry, no tissues
Eumetazoa
Definite symmetry, tissues organized
Chordate
Animal with notochord
A zoologist studies an animal that is a deuterostome. Which of the choices makes the sentence that follows incorrect?
You know that deuterostomes…
Are animals in which the blastopore develops into the mouth
Segmentation is the subdivision of the body into segments or metameres. True segmentation is found in which of the following phyla selections?
Arthropoda, Annelida, and Chordata
Parazoa have no true ___.
Tissues
Which of the following terms does not apply to the phylum Porifera?
Diploblastic
Sponges are unique in possessing special flagellated cells whose beating drives water through the body cavity. These specialized cells are known as ___.
Choanocytes
Sponges exhibit all of the following general characteristics except
Three cell layers
All of the following are true about Cnidarians except
Their bodies are made up of distinct organs
Phylum Platyhelminthes is characterized by all of the following except
All are free-living
Flukes are parasitic worms whose josh during the larval stage are usually ___.
Snails
The stage in the flukes life history in which it escapes from the snail and is ready to enter the intermediate or final host is the ___.
Cercariae
Trichinella nematodes reach muscle tissue, forming resistant cysts, after
Entering the lymph channels following penetration of the intestine
Which one of the following taxa is not part of the grouping of clades called lophotrochozoa?
Arthropoda
Which of the following is not a type of Cnidarian?
Comb jelly
The phylum that includes snails, clams, oysters, and octopuses is ___.
Mollusca
In mollusks, the folds of tissue that arise from the dorsal body wall and enclose a cavity surrounding the visceral mass are called the ___.
Mantle
The organ that is responsible for secreting cocoons in the Oligochaetes is known as the ___.
Clitellum
Examples of mollusks that live on land are the ___ and ___.
Snails and slugs
The cephalopod mollusks have ___.
Tentacles
The sexual reproduction of earthworms characteristically is
Hermaphroditic but cross-fertilizing
A biologist has been studying a mollusk that does not have a shell. It lives in the marine environment. Of the examples given, which one did the biologist study?
Octopus
Select the mismatched pair of phylum Mollusca classes.
Bivalvia - snails
A marine biologist visits your biology class and begins his talk entitled, “Life as a Trochophore.” A friend seated next to you asks, “what is a trochophore?” You explain that a trochophore is…
A term used to describe a larval form of either the phylum Mollusca or Annelida
Which class of Arthropods contains members with two pairs of antennae and legs on their abdomen and thorax?
Crustacea
The most successful class of Arthropods is ___.
Insecta
In Arthropods, locomotion is accomplished by muscles that work against…
The exoskeleton
Oxygen diffuses to the tissues of terrestrial Arthropods through the ___ and ___.
Trachea and tracheoles
Chelicerae function as ___ or ___.
Fangs or pinchers.
These Echinoderms have soft, slug-like bodies with tough, leathery skin. They are the ___.
Sea cucumbers
The only living Echinoderms that are fully sessile are ___.
Sea lilies
Small, fishlike marine chordates, pointed at both ends with no distinguishable head, in which the notochord runs the entire length of the nerve cord, are called ___.
Lancelets
One of the most critical adaptations of the reptiles in relation to their life on land is the evolution of the …
Amniotic egg
The chordates include all of the following except
Echinoderms
Amphibians are thought to have evolved from what?
Lobe-finned fish
Which of the following is not one of the membranes of the reptilian amniotic egg?
Ectoderm
All of the following are features that contribute to the ability of reptiles to survive on dry land except
Endothermy
The changes that were necessary to cope with the heavy energy demands of flight in birds include all of the following except
A three chambered heart
Mammals are thought to have evolved from ___.
Therapsids
Monotremes differ from the other mammals in their …
Laying of shelled eggs
The correct listing of vertebrate groups ranked by species richness
Fish -> birds -> reptiles -> amphibians -> mammals
The key specialization a that occurred in the evolution of mammals include all of the following except …
Reduction in brain size
Modern-humans share the greatest similarities with which one of the hominids?
Cro-Magnons
