After doing research on plants and fertilizers, a 5th grade science class states the hypothesis for their experiment; "If a plant receives fertilizer, then it will grow to be bigger than a plant that does not receive fertilizer." To test this hypothesis the students must . A) make observations B) collect and record data C) determine and follow a procedure D) make observations, collect and record data, and determine and follow a procedure

D

Explanation:

D is a combination of all three options above, and ALL those steps need to be done, so it is D.

If you are ever stuck on a problem and cannot receive help, usually the answer that is "all above" right, but not always.

primary succession begins with a bare rock and ends with a forest secondary succession begins after a natural disaster where there is a temporary setback after a forest fire or local destruction, but the surrounding area can fill in

if the type of the food available changes, then the frequency of beak types will change, because birds with beaks more suited to the available food will be more successful over time.