What is meant by the term chiasma?
What will be an ideal response?
Chiasma are areas where chromatids intertwine during meiosis and where nonsister chromatids have undergone genetic exchange.
You might also like to view...
Which of the following DOES NOT occur in Euglenozoa?
A. disk-shaped mitochondrial cristae B. kinetoplasts C. glycolysis in the peroxisomes D. cilia E. inter-locking protein strips
When certain molecules are pumped across biological membranes against a concentration gradient via active transport, ATP is used
In the cells of our bodies, for example, sugars are actively transported and metabolized within the membrane-enclosed mitochondria. Prokaryotes, in contrast, lack mitochondria but are nonetheless able to metabolize the same sugars. Based on the details provided in this scenario, which of the following statements is expected to be TRUE? A) Overall, prokaryotes will gain more ATP per sugar molecule metabolized than will eukaryotes. B) Sugar metabolism in prokaryotes is exergonic, whereas in eukaryotes it is endergonic. C) The sugar-digesting enzymes in eukaryotic cells, such as sucrase, are not the same sugar-digesting enzymes found in prokaryotic cells. D) Prokaryotes and eukaryotes should have the same metabolic efficiency when digesting the same sugars, assuming their enzymes are the same.
Both fish and humans develop neurological symptoms and bloody skin lesions due to a sudden "bloom" of this algae.
A. diatoms B. Prototheca C. Phaeophyta D. Pfiesteria piscicida E. All of these choices are correct.
Choose the true statement about the morphological data in the chart shown below. The "1" in the box means the trait is present and the "0" indicates that the trait is absent.(Note: All of the characteristics across the top of the columns are considered "TRAITS" for purposes of reading the chart.). Traits OrganismJawsLungsAmniotic membraneHairNo tailBipedalLamprey000000Shark100000Salamander110000Lizard111000Tiger111100Gorilla111110Human111111
A. Only the gorilla and humans share all of the derived characteristics. B. All organisms in this chart share all of the derived characteristics. C. The shark is the outgroup since it only has one of the derived characteristics (jaws). D. The lamprey is the only outgroup since it has none of the derived characteristics. E. The salamander and the tiger together are the outgroup because they only share two of the derived characteristics (jaws and lungs).