Which question below is impossible to test through observation? What is the average amount of acorns squirrels living in a park collect in fall?
Which foods did dinosaurs compete for?
Which bird species migrates in winter?
Which type of flower in a field stays in bloom the longest?

Restriction enzymes are used in making recombinant dna. describe the role restriction enzymes perform when constructing recombinant dna.

Explain what a zygote is. use the terms egg cell, sperm cell, and fertilization in your explanation.

Your two friends just told you what to order for them at the drive through fast food restaurant. you give the order but when the food comes about 10 minutes later, you don't remember what each of your friends ordered your memory of the order was in __ memory. a. semantic b. flashbulb c. long-term d. short-term i think i know but i'm not really sure