The food web below shows the feeding relationships of six different populations in an ecosystem. snake
mouse
grass
spider
grasshopper
sparrow
Which populations compete with one another for food?
mouse and spider
sparrow and snake
mouse and grasshopper
snake and grasshopper spider and sparrow sparrow and grasshopper

In general, characteristics that an organism survive and reproduce become more common over time. what mechanism of evolution causes this?

Which best describes carbon dioxide’s path out of the body

16. which of the following accurately describes a step within transcription? a. dna polymerase uses one strand of rna as a template to put together nucleotides. b. the dna strand is used as a template for which a complementary rna strand can be produced. c. the rna strand forms a template by which dna can be built. d. the rna strand is produced within the cytoplasm.