Choose the correct words to complete the sentences to explain the types of communities found in the tropical and temperate zones. The tropical zone plays a major role in regulating weather. The tropical zone has an abundance of (kelp, coral, phytoplankton) , which is scarce in the temperate zone. However, (kelp, coral, sea grass) grows in the temperate zone and is absent from the tropical zone

Explain how sequences of amino acids in proteins can be used to reveal relationships among organisms.

Two students are working together on an experiment that measures the effect of different liquid fertilizers on the thickness of plants’ stems. which is most likely to result in the greatest amount of error in their scientific experiment? a.one student measures the plant stem widths by using calipers. the other student measures the widths of the same plant stems again by using a different pair of calipers. b.one student measures the plant stem widths by using calipers. the other student types the measurements as they are taken into a computer spreadsheet. c.one student weighs liquids for the experiment by using a calibrated scale. the other student weighs liquids for the experiment by using a different calibrated scale.

What substance is the most acidic. lemon juice. tomato juice. sodium hydroxide. water