Some nouns that end in -um are made plural by changing the –um to –a. which of the following best explains this change? a. they have greek origins and therefore have irregular plural forms. b. they have latin origins and therefore have irregular plural forms. c. they have spanish origins and therefore have irregular plural forms. d. there are no words that change forms like that in english

Slowly swimming towards recovery, california's sea otter numbers holding steady posted on september 22, 2014 usgs.gov read the following passage: when sea otters want to rest, they wrap a piece of kelp around their body to hold themselves steady among the rolling waves. likewise, california's sea otter numbers are holding steady against the many forces pushing against their population recovery, according to the latest field survey led by federal, state, aquarium, and university scientists. since the 1980s, u.s. geological survey scientists have calculated a population index each year for the southern sea otter—enhydra lutris nereis—a species federally listed as threatened. the annual range-wide field survey collects data on this protected marine mammal on behalf of the u.s. fish and wildlife service. trends in population index reported by usgs for southern sea otters in california. data are shown for independent otters, nonpups, and all otters for mainland california, san nicolas island, and rangewide from 2012 onward. the mainland all otters line increases gradually from 1990 to 2014 from less than 1800 to about 2800. the mainland independents mirror the all otter population curve at slightly lower numbers. the san nicolas island population begins at about 18 in 1992 and climbs to about 65 in 2014. why does the author include the chart in the article? to provide a comparison of changes in the two groups of sea otter populations to provide a depiction of the variety of sea otter populations in the area to provide a list of the groups of ecosystems that were included in the study to provide a visual representation of how sea otter populations have changed

Which type of irb review does not require an irb approval but does require a determination by the irb or an irb designee?

Kiko is writing an introduction for an article about the red panda. read what she has so far. what has red fur and a ringed tail, and is as big as a housecat? why, a panda, of course! the red panda doesn’t look much like its black-and-white cousin, the giant panda, but the two actually have a lot in common. which of the following should she add to her introduction? a. a clear central idea b. an opening that grabs the reader’s attention c. a statement previewing what points the essay will compare d. a statement that summarizes kiko’s opinions about the animals