In response to seasonal changes in temperature, many organisms must alter the composition of their plasma membranes to maintain the proper degree of fluidity. as summer turns to fall and eventually into winter, which of the following would you predict you would observe in the plasma membranes of organisms that are unable to regulate their body temperature? a. a decrease in phospholipid fatty acid side chain saturation and a decrease in cholesterolb. a decrease in phospholipid fatty acid side chain saturation and an increase in cholesterolc. an increase in phospholipid fatty acid side chain saturation and an increase in cholesterold. an increase in phospholipid fatty acid side chain saturation and a decrease in cholesterol

Organisms are classified, or grouped into categories, based on similarities in their characteristics and/or evolutionary relationships. the study of how organisms are classified is known as

Examine the two squirrel populations in the accompanying figure. the populations are separated by a geographic barrier. if after a long period of time the two species are no longer separated, what evidence is needed to determine if speciation has occurred? the figure shows two populations of squirrels separated by a geographic barrier. examine the two squirrel populations in the accompanying figure. the populations are separated by a geographic barrier. if after a long period of time the two species are no longer separated, what evidence is needed to determine if speciation has occurred? the figure shows two populations of squirrels separated by a geographic barrier. polyploidy is creating new species. the two populations are not interbreeding freely. hybrid offspring of the two populations begin to appear. one species will increase into a population size twice as large as the other species.

Select the correct answer. a chestnut-colored horse mates with a white-colored horse to produce a brown and white spotted offspring. what is the type of inheritance pattern?