The process of nitrification is

carried out by what group of

organisms?

A. producers

B. animals

C. bacteria

Juan is interested in finding out whether hummingbirds attracted to sunflowers more than others. In what order should one perform the steps of his experiment

Where is DNA located in eukaryotic cells

In which ways are RNA and DNA different? a. RNA has ribose sugar, DNA has deoxyribose sugar b. RNA has uracil, DNA has thymine c. RNA is single-stranded, DNA is a double-helix d. all of the above

Which of the following are found in plant cells, but not in animal cells? Pick three. Select one or more: a. large vacuoles b. plasma membranes c. cell walls d. chloroplasts

Of what value are forests besides for wood?

What shows a brain structure correctly paired with one of its primary functions?

What pigment traps the energy?

Which statement about how geologists study the ages of rock layers is true?

Why is sti considered a scientifically controversial strategy?

What would most likely happen to the carbon cycle if here were no more plants on earth