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In an experiment of the effect of fertilizer on tomato plant growth, Rick decides to apply the fertilizer to only some of the plants and use the rest as controls to compare. He applies fertilizer to the 2 smallest plants. When he measures their growth at the end of the week, he finds the plants treated with fertilizer haven’t grown as much as the untreated plants. What is the biggest mistake Rick made with his experiment?

Evaporated ocean water  is returned by which of the following?

Ground and soil water are found in (check all that apply)

In corn, the gene for purple color (P) is dominant over the gene for yellow color (p), and the gene for smooth, starchy texture (S) is dominant over the gene for rough, sweet texture (s). You crossed two purple starchy parents that were heterozygous for both traits. Based on the laws of Mendelian Inheritance, what are the possible gametes of one of the parents.

Based on the numbering in the image, which arrow is pointing to the STAGE ADJUSTMENT knob on this standard brightfield microscope?

Which of the two pictures displays cytokinesis in a PLANT?

Which of the following describes an advantage of viewing STAINED specimens using standard brightfield microscopy?

Which of the models below most closely represents the basic structure of DNA?

Sayed shared that he observed light pollution at his work place and shared this knowledge with his boss, hoping to increase awareness and planting the seed for positive change to decrease pollution.  Where was his workplace?

Which of the following items SHOULD be disposed of in the container in the image below? (Select all that apply)