In a population of plants with a diploid number of 12, a new individual appeared with a chromosome number of 24. If this organism could self-fertilize, forming offspring with the same number of chromosomes (24), scientists would consider this an example
of
A) sympatric speciation.
B) behavioral isolation.
C) formation of a hybrid zone.
D) reduced hybrid fertility.
Answer: A
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A(n) ____ is a group of neighboring populations that exchange individuals
a. K-selected species b. Type I species c. r-selected species d. sink population e. metapopulation
Early one morning in a microbiology class, a student examining his cheek scraping slide with a light microscope, spots an unusual bunch of cells mixed in with the large nucleated cells from his cheek. His instructor takes a look and informs him that they are bacteria. Would those be prokaryotic or eukaryotic cells?
a. both b. neither c. prokaryotic d. eukaryotic
A male fish has changed into a female fish. What kind of hermaphroditism occurred?
a. Synchronous b. All of these choices c. Protogyny d. Protandry
The development of normal maternal behavior in female mice depends on interactions between the female and her young and the presence of a gene called fosB. In mice with functional fosB genes, a sequence of events occurs after babies are born.Arrange the events in their normal sequence following the birth of baby mice for a wild-type female.____ The gene fosB is activated, producing protein that activates other genes.____ Auditory, olfactory, and tactile signals about the young are sent to the hypothalamus.____ Female crouches over young and retrieves them if they leave the nest.____ Female inspects newborns.____ Neural circuitry within the hypothalamus is modified, facilitating maternal behavior.
What will be an ideal response?