Concept explainers
(a)
To determine:
The species concept that could be applied to both sexual and asexual species
Introduction:
Species are the part of a population that shares similar traits with each other. They have the potential to interbreed and produce viable offsprings in turn. The four different types of species concept are: the typological species concept, the biological species concept, the evolutionary species concept, and the recognition species.
(b)
To determine:
The most useful concept for identifying species in the field.
Introduction:
Species are the part of a population that shares similar traits with each other. They have the potential to interbreed and produce viable offsprings in turn. The four different types of species concept are: the typological species concept, the biological species concept, the evolutionary species concept, and the recognition species.
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Campbell Biology in Focus
- What causes sexual dimorphism? Give some examples of sexually dimorphic species, and why you think that form of sexual dimorphism arose.arrow_forwardIs sexual reproduction required to generate the variability in structures and behaviors that is necessary for natural selection?arrow_forwardHow do these similarities and differences relate to the evolutionary relationships between these species?arrow_forward
- Which of the following is a problem with using the Biological Species Concept? A. it doesn't apply to asexual populations B. It doesn't apply to tropical organisms C. it doesn't take into account reproductive compatibility D. there are no issues with this species conceptarrow_forwardIs parental care of a species a factor that affects embryological development? If so, how?arrow_forwarddifferent sexes can be confirmed by studying living species. How could you look for evidence of sexual dimorphism in the fossil record? How could you distinguish this from ontogenetic differences (i.e. juveniles vs. adults)?arrow_forward
- How can we account for the extensive differences between the two species?arrow_forwardIn the context of the evolutionary relationship among ants, wasps, and bees, how come that these insects have shared common characteristics?arrow_forwardDo all dioecious species have a homogametic and a heterogametic sex? 1. Yes, because dioecious means that two types of gametes are produced, even in hermaphroditic species. 2. Yes, because all sex-determining systems include heterogametic and homogametic sexes. 3. Yes, because in dioecious organisms, either the XX-XY or the ZZ-ZW system determines sex. XY and ZW individuals are heterogametic. XX and ZZ individuals are homogametic. 4. No, because hermaphrodites and species that reproduce asexually are dioecious. 5. No, because dioecious means that the sexes are separate, regardless of how sex is determined. In some dioecious species, sex is determined by a single gene.arrow_forward
- Is the biological species definition likely to work well for classifying insects in amber? Plants that reproduce asexually? Fish in an aquarium?arrow_forwardwhy do the embryos of different species resemble each other?arrow_forwardHow is the frequency of cotransduction related to the relative position of genes on a bacteial chromosome? Draw a map of three genes and describe the expected relationship of cotransduction frequencies to the map.arrow_forward
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