Which type of fish is likely to produce the smallest number of progeny from each mating?
A. An oviparous species
B. An ovoviparous species
C. A viviparous species
Clarify Question
What is the key concept addressed by the question?
What type of thinking is required?
Gather Content
What do you already know about strategies for development? What other information is related to the question?
Choose Answer
Given what you now know, what information is most likely to produce the correct answer?
Reflect on Process
Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
C. A viviparous species
Clarify Question
What is the key concept addressed by the question?
· The concept addressed in this question is the relationship between offspring number and the strategy of development.
What type of thinking is required?
· Evaluate level:
o This question is asking you to weigh and judge, or evaluate, the effect of the different strategies for development on offspring number.
Gather Content
What do you already know about strategies for development? What other information is related to the question?
· Oviparity involves the external development of fertilized eggs.
· All birds, some fish, some amphibians, most reptiles, and very few mammals utilize oviparity.
· Ovoviviparity occurs when eggs are fertilized internally, and develop inside the mother’s body. Nutrients are provide entirely by the egg; there is no connection between the mother and her offspring.
· Ovoviviparity is found in some fish and many mammals.
· Viviparity is the live birth of offspring. Young do receive nourishment from the mother while they develop.
· Viviparity is exemplified by nearly all mammalian species, and some fish, amphibians, and reptiles.
Choose Answer
Given what you now know, what information is most likely to produce the correct answer?
· Viviparity requires the most allocation of resources, and thus results in relatively fewer, but better prepared offspring.
Reflect on Process
Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
· Evaluate level:
o Answering this question correctly depended on your ability to weigh and judge, or evaluate, different developmental strategies in fish. If you got an incorrect answer, did you remember that viviparity differs from ovovivparity in fish because the energetic investment of the mother is greater in viviparity, or that oviparity potentially involves the lowest parental effort after eggs are fertilized? Did you have trouble weighing the merits of the different developmental strategies to determine the correct answer?
You might also like to view...
A researcher proposes that the relationship between a particular bacterial species that produces a fat-soluble vitamin is mutualistic with its insect host. Which of the following procedures would best test the researcher's hypothesis?
A. Design a method to isolate the bacteria from the insect, then mutate the bacteria in the region of DNA that controls vitamin production and compare growth of the mutant and wild-type bacteria on minimal media B. Extract the DNA from the bacteria and from the insect, then use reverse-transcriptase PCR and primers specific to the gene that controls vitamin synthesis to compare transcription of RNA in both organisms C. Determine which insecticide kills the insect without harming the bacterial host, then compare vitamin production by the bacteria from insects treated with the insecticide to those from untreated insects D. Determine which antibiotic kills the bacteria without harming the host, then administer this antibiotic to the insect and compare its growth with and without the vitamin
Experiments done at Cedar Creek Long Term Ecological Research site are ideal for examining concepts at what level?
A) ecosystem B) population C) community D) individual
Which statement describes the expected population growth in the next 50 years?
A) The population growth will be relatively equal throughout the world. B) The greatest population growth is likely to occur in the more industrialized countries, including the United States and Europe. C) Most countries worldwide will achieve zero population growth in the next 10 years. D) The greatest population growth is likely to occur in the least industrialized countries. E) There will be a net decline of population, with the United States and other industrialized countries contributing most to the population decline.
Infectious diseases can be classified on the basis of
A. severity and duration of the disease. B. means of transmission. C. organs or organ systems affected by the disease. D. type of microbe that causes the disease. E. disease severity and duration, organ system affected or type of microbe.