Just as the Pleistocene was ending and Earth was warming, an event called the Younger Dryas plunged Earth back into one thousand years of cold temperatures. What is one leading hypothesis for the cause? Question 19 options:

glaciation of Antarctica

"nuclear winter" due to asteroid impact over Greenland

glaciation of the Andes and Himalaya

burial of organic carbon decreasing atmospheric CO2

What causes temperature extremes in the desert

The wings of insects, birds, and bats evolved independently but carry out similar functions. this is an example of a. analogous structures. b. embryonic structures. c. vestigial structures. d. homologous structures.

Two students are working together on an experiment that measures the effect of different liquid fertilizers on the thickness of plants’ stems. which is most likely to result in the greatest amount of error in their scientific experiment? a.one student measures the plant stem widths by using calipers. the other student measures the widths of the same plant stems again by using a different pair of calipers. b.one student measures the plant stem widths by using calipers. the other student types the measurements as they are taken into a computer spreadsheet. c.one student weighs liquids for the experiment by using a calibrated scale. the other student weighs liquids for the experiment by using a different calibrated scale.