If you discovered a new colonial organism living deep on the sea floor, how could you determine whether it reproduced sexually or asexually? (Check all that apply)
_____ Compare DNA to see if nearby individuals are identical.
_____ Compare morphology to see if nearby individuals are identical.
_____ Look for external buds still attached to the parent.
_____ Look for a coelom.
_____ Look for gonads with mitotic figures and embryos.
_____ Look for gonads with meiotic figures and gametes.
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 sexual vs asexual reproduction? 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 Proces
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?
__X__ Compare DNA to see if nearby individuals are identical.
_____ Compare morphology to see if nearby individuals are identical.
__X__ Look for external buds still attached to the parent.
_____ Look for a coelom.
_____ Look for gonads with mitotic figures and embryos.
__X__ Look for gonads with meiotic figures and gametes.
Clarify Question
What is the key concept addressed by the question?
· This question is asking about how offspring produced by asexual reproduction differ from those produced by sexual reproduction.
What type of thinking is required?
· Analyze level:
o This question is asking you to identify key factors that qualify whether something was produced by sexual or asexual reproduction.
Gather Content
What do you already know about sexual vs asexual reproduction? What other information is related to the question?
· Sexual reproduction is characterized by gonads using meiosis to produce gametes.
· Offspring produced by sexual reproduction differ from their parents genetically.
· Asexual reproduction is characterized by budding or other strategies that produce genetically-identical progeny.
Choose Answer
Given what you now know, what information is most likely to produce the correct answer?
· Members of a species do share a common morphology, but this common appearance can be the result of asexual or sexual reproduction.
· A coelom is not diagnostic of sexual or asexual reproduction. Coelomates reproduce sexually and asexually, depending on species and environment.
· Gametes are produced via meiosis, so mitotic figures would not be diagnostic.
· Individuals that are produced by asexual reproduction are alike genetically, so if nearby individuals are identical, one could conclude they were produced asexually.
· Budding is a form of asexual reproduction, so the presence of buds indicates asexual reproduction took place.
· Gonads with meiotic figures would indicate that sexual reproduction is occurring.
Reflect on Proces
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?
· Analyze level:
o Answering this question correctly depended not only on distinguishing between sexual and asexual reproduction, but on your ability to break down, or analyze, the resulting offspring. If you got an incorrect answer, did you remember that components of asexual reproduction include genetically identical offspring, or that sexual reproduction utilizes gonads to make gametes via meiosis? Did you have trouble breaking down the different reproductive strategies to determine the correct answer?
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One important difference between the C, N, and S cycles and the P, Ca, and Si cycles is that
A) P, Ca, and Si are NOT cycled in terrestrial environments. B) the P, Ca, and Si cycles do NOT involve redox changes or gaseous forms that can alter Earth's atmospheric chemistry. C) the P, Ca, and Si cycles do NOT involve microbial activity. D) the P, Ca, and Si cycles are NOT affected by global warming or other human activity.
Natural selection operates directly on
a. the genotype. b. individual alleles. c. the phenotype. d. color only.
The genetic code is made up of codons consisting of
how many nucleotides? a. 2 b. 3 c. 5 d. 6 e. 9
Which of the following best describes the photosynthetic membranes of Chlorobia?
A. Accessory bacteriochlorophylls are located in the plasma membrane, but the reaction center bacteriochlorophyll is located in the chlorosomes. B. Accessory bacteriochlorophylls are located in the chlorosomes, but the reaction center bacteriochlorophyll is located in the plasma membrane. C. Accessory and reaction center bacteriochlorophylls are located in the chlorosomes. D. Accessory and reaction center bacteriochlorophylls are located in the plasma membrane.