Step 4: Measure the Heights of the plants at the End of Week 1

cm

55

50

Use a calculator to compute

the average heights of the

plants in each group to the

nearest centimeter

Week 1 Average Height

х

Control Group: 14

=9 cm

Exper. Group: 10

х

8 cm

COMPLETE

Difference

cm

5

6

6

DONE

3 4

Control Group

1 2 3 4 5

Experimental Group

Intro

Describe your dna model. which part do the straws represent? the pushpins? the paper clips and the black dots you made with the marker?

Which of the following is likely not involved in this example of ecological succession? a) the rotting remains of plants add to the fertility of the soil. b)the soil becomes so fertile that eel grass is replaced by other plant species. c) the roots from plants stabilize the sediment, keeping it in place. d) the concentration of salt becomes so high that all plant life is destroyed.

There are only about 250,000 known fossil species. true or false