Chemicals used to kill insects and other pests that diminish crop yields are called A) asbestos
B) pesticides
C) carbon sinks
D) myrmecophytes
E) carcinogens

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.

Which is an innovation of gymnosperms? gymnosperms are the first seed plants. gymnosperms are the first flowering plants. gymnosperms are the first vascular plants. gymnosperms are the first spore plants.

In the figure below, which letter points to the structure through which water is lost during transpiration?