BIOL 111 Lecture Notes - Lecture 7: Symmetry In Biology, Median Plane, Sponge
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QUESTION 1
The âCambrian Explosionâ describes the relatively sudden appearance of __________ in the fossil record in the Cambrian.
Metazoans | ||
Eukaryotes | ||
Algae | ||
Cephalopods | ||
Chocolate |
0.5 points
QUESTION 2
Poriferans lack:
Extracellular matrix | ||
Organs | ||
Choanocytes | ||
Nuclei |
0.5 points
QUESTION 3
Which of the following has no terrestrial species?
Brachiopoda | ||
Nematoda | ||
Mollusca | ||
Arthropoda |
0.5 points
QUESTION 4
The metazoan phylum with the greatest diversity (i.e., number of species) today is:
Arthropoda. | ||
Annelida. | ||
Cnidaria. | ||
Mollusca. |
0.5 points
QUESTION 5
Segmentation is a feature of:
Cnidarians | ||
Platyhelminthes | ||
Nematodes | ||
Annelids |
0.5 points
QUESTION 6
A coelom is:
Fun for the whole family. | ||
A fluid-filled body cavity forming within the mesoderm. | ||
A stinging cell found in cnidarians. | ||
A characteristic of flatworms. | ||
A fluid-filled body cavity between the mesoderm and endoderm. |
0.5 points
QUESTION 7
How old is the earliest fossil evidence of life?
3.8 Ma | ||
3.8 Ga | ||
1.8 Ga | ||
543 Ma |
0.5 points
QUESTION 8
Which of the following is found only in bilaterians?
Mesoderm | ||
Choanocytes | ||
Radial symmetry | ||
Gastrulation | ||
Nougat |
0.5 points
QUESTION 9
Which of the following is not an explanation put forward for the Cambrian Explosion?
Oxygen increase | ||
Revolution in substrate use | ||
Predation | ||
Global warming |
0.5 points
QUESTION 10
Cnidarians are distinct from other animals in having:
A can-do attitude | ||
Nematocysts | ||
Chitin | ||
Collagen | ||
Bilateral symmetry |
0.5 points
QUESTION 11
Which of the following is a group within Platyhelminthes?
Insecta | ||
Velveeta | ||
Bivalvia | ||
Cestoda | ||
Hydrozoa |
0.5 points
QUESTION 12
Of Fungi, Metazoa, and Plantae, which two are thought to be more closely related to each other than they are to the third?
Metazoa and Plantae | ||
Fungi and Plantae | ||
Fungi and Metazoa |
0.5 points
QUESTION 13
The Cryogenian is a period of the Proterozoic characterized by:
Low self esteem | ||
Earliest fossils of life | ||
Cooling and glaciation | ||
Sudden appearance of fossils with hard parts | ||
Increase in oxygen |
0.5 points
QUESTION 14
Which of the following is thought not to have been abundant in the environment of the early Earth when life originated?
Oxygen | ||
Nitrogen | ||
Methane | ||
Water |
0.5 points
QUESTION 15
Of Archaea, Bacteria, and Eukarya, which two are thought to be more closely related to each other than they are to the third?
Bacteria and Eukarya | ||
Archaea and Bacteria | ||
Archaea and Eukarya |
0.5 points
QUESTION 16
The increase in oxygen that occurred around 2.3 Ga is referred to as:
The Snowball Earth | ||
The Permian Extinction | ||
The Cambrian Explosion | ||
The Great Oxidation Event | ||
Friday |
0.5 points
QUESTION 17
A lophophore is:
A feeding structure found in brachiopods and bryozoans. | ||
A reproductive structure found in annelids and molluscs. | ||
A photoautotroph. | ||
Available at Targetâ¢. | ||
Absent in all lophotrochozoans. |
0.5 points
QUESTION 18
One of the main divisions of protostomes is:
Electronica | ||
Cnidaria | ||
Eukarya | ||
Lophotrochozoa | ||
Deuterostomia |
0.5 points
QUESTION 19
If, as some studies have suggested, Ctenophora is the sister-taxon to other metazoans, this would imply that:
Poriferans are not animals. | ||
Cnidarians are not monophyletic. | ||
We are all hosed. | ||
Nervous systems evolved more than once, or were lost by Porifera. | ||
Ctenophorans are cnidarians. |
0.5 points
QUESTION 20
The chambered shells of fossil cephalopods contribute to:
Feeding. | ||
The Red Cross. | ||
Respiration. | ||
Control of buoyancy. | ||
Propulsion. |