3.Most South American monkeys have color vision. But the members of one genus, Aotus, also
known as "owl monkeys," do not have color vision. Scientists think that the genus evolved from
monkeys that did have color vision. The ability to see color was lost when it was no longer
helpful. Which other trait of the genus would contribute MOST to making color vision
unimportant?
(1 Point)
a) The monkeys live in the trees of dense forests.
b) The monkeys make eight different sounds.
c) The monkeys are active only at night.
d) The monkeys choose mates for life.

Select the correct answer. in the image, if the washcloth represents consumed food, which organ of the digestive system correctly represents the action performed by the hands? hands squeezing water from a washcloth a. esophagus b. large intestine c. liver d. mouth

Which best describes a gene? a. a sister chromatid b. a chromosome c. a tetrad d. a piece of a chromosome

Juan and carol were studying invertebrates in biology. they knew that segmented or earth worms preferred a dark, moist habitat. during this lab, they would be investigating the responses of organisms called planaria or dugesia tigrina. these were simple flatworms that still had a one-way digestive system and a very simple nervous system. juan and carol placed the planaria in a petri dish containing cool, distilled water that was partially covered with black paper. they shined a light on the dish. next, they removed the paper and placed a small amount of chicken liver at one end of the dish. they added a few large salt crystals to the water. finally, they added drops of hot water to the cool water in the petri dish. their results can be seen in the data table. according to their experiment, all but one conclusion is valid.