Biology Cumulative Exam Review guide study material graded A+

The graph shows the changing levels of hormones during menstruation and ovulation. Which hormone has the most influence on preparing the body for pregnancy? - correct answer C. Progesterone promotes fertility because its levels rise during ovulation and immediately after. The Great Pacific Garbage Patch is an area in the North Pacific Ocean that contains trash and causes harm to ocean life and those that consume that life. What lessons can be learned from this floating pile of trash? - correct answer D. There is a relationship among all living things on Earth. Which describes a disadvantage of social behavior? - correct answer A. Foraging could increase competition for food. Consider the recent phylogenetic tree of five different organisms. Old classification systems based on physical characteristics would most likely disagree with the relationship between which two animals in the tree? - correct answer C. birds and bats Scientists group organisms into kingdoms by looking at specific characteristics. Thermus aquaticus, shown below, is a specialized bacteria called a thermophile. Thermophiles are microorganisms that can live in bodies of water that are extremely hot, such as deep sea hydrothermal vents. Which characteristic most likely describes a mushroom but not Thermus aquaticus? - correct answer B. eukaryotic What is the main component of the thin filaments in muscle fibers and is responsible for muscle contraction? - correct answer A. actin Consider the cladogram. Which is the best description of the two organisms highlighted in orange? - correct answer B. They share a recent common ancestor. Which best describes the relationship between two species and a niche? - correct answer C. Two species cannot occupy the same niche in the same habitat. Darius made a diagram to compare and contrast two benefits of social behavior. Which description belongs in the area marked "X"? - correct answer A. keeps group safe from predators A muskrat population is growing exponentially. What might cause this population to enter logistic growth? - correct answer A. resources become scarce