For her science fair project, Chloe studied the growth of trumpet vines. She grew 20 trumpet
vines. All of the conditions were the same, except
that she grew 10 in a flower bed without support
and 10 in a flower bed near a trellis. The stems of
the vines near the trellis twisted around the trellis,
and these vines grew tall and seemed much
healthier than the vines grown without a trellis. In
fact, four of the vines grown without a trellis died.
Which characteristic of living things were the
trumpet vines displaying as the stems twisted
around the trellis?
O A. Production of offspring
OB. Use of materials and energy
O C. Movement and change
O D. Growth and development

Our planet has experienced five major extinctions in the four billion year history of life. the first, 450 million years ago, occurred shortly after the evolution of the first land-based plants and 100 million years after the cambrian explosion. the second extinction occurred 350 million years ago, causing the formation of coal forests. next earth experienced two mass extinctions during the triassic period, between 250 and 200 million years ago. the fifth mass extinction occurred 65 million years ago, ending the reptilian dominance of the earth. according to richard leakey, the sixth mass extinction is happening right now. leakey suggests that we, the human race, are the cause. each year, at our hand, approximately 50,000 species vanish from earth. he believes that man is destroying earth at a rate comparable with the impact of a giant asteroid. leakey's statistics indicate that 50% of earth's species will become extinct within the next 100 years assuming leakey's hypothesis of a sixth mass extinction to be true, how will we expect the model to change? a) a sharp spike in the graph approximately 100 million years from now b) a dip in the graph, followed by a sharp spike about 100 million years from now c) a sharp spike in the graph immediately following the "0" location of the x axis d) a plateau following the "0" mark on the x axis, followed by a gradual rise to a new peak