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

Biology & Microbiology

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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

Biology & Microbiology

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

Biology & Microbiology

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?

Biology & Microbiology

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

Biology & Microbiology