Shelby is a plant breeder who is trying to identify the cause of a disease among a group of trees. She observes that the organism reproduces through spores and has reproductive structures that are shaped like a sac. Which type of fungus is it?
Which organelle can be compared to a security guard who decides whom may enter a building and whom may not?
Which statement best describes the difference between xylem and phloem?
In rock layers, jellyfish fossils are found lower than trilobite fossils, and trilobite fossils are found lower than ammonite fossils. What can be determined from this information?
Which is an example of temporal isolation?
Which example best demonstrates the importance of having knowledge of evolutionary relationships?
Ceratium fusus is a protist that is found primarily in coastal waters, especially around the coast of the United Kingdom. These organisms are unique because they can undergo a special chemical reaction at night that helps defend them against predators. It provides defense by attracting larger predators that prey on the organisms that eat Ceratium fusus. Which characteristic of Ceratium fusus is being described?
An animal cell (left) and a plant cell (right) are shown.Which organelle, labeled X in the diagram, is found in both plant and animal cells?

According to the endosymbiotic theory, which cellular process was involved in the evolution of mitochondria and chloroplasts?
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