A phylogenetic tree showing the evolutionary relationships among seven primate species. The tree is oriented horizontally with the root on the left and terminal taxa on the right. From top to bottom, the terminal taxa are: Lemur, Tarsier, New World Monkey, Old World Monkey, Gibbon, Chimpanzee, and Human. Branch points (nodes) are labeled with letters A through F from left to right. Node A is the deepest divergence separating Lemur from all others. Node F is the most recent divergence, separating Chimpanzee and Human. A scale bar at the bottom indicates relative time or genetic distance.

The left side shows a diagram of an experimental setup with a large beaker filled with 5% sucrose solution. Three dialysis bags are submerged: Bag A contains distilled water, Bag B contains 5% sucrose, Bag C contains 10% sucrose. Data table and line graph show Bag A mass decreasing, Bag B stable, Bag C increasing over 30 minutes.

Thyroid feedback loop diagram showing Hypothalamus releasing TRH to Anterior Pituitary releasing TSH to Thyroid Gland producing T3/T4 with negative feedback arrows. Line graph showing low TSH and high Free T4 in a hyperthyroid patient over 12 months.

Thyroid feedback loop diagram and line graph showing low TSH and high Free T4 in a hyperthyroid patient over 12 months.

A labeled diagram of a rod-shaped prokaryotic cell. Labels point to: cell wall, plasma membrane, nucleoid with circular DNA (no membrane), ribosomes (70S) scattered in cytoplasm, flagellum, plasmid (small circular DNA), and cytoplasm.

Two panels: left showing the HPA axis diagram with CRH, ACTH, and cortisol pathways with negative feedback arrows; right showing a line graph comparing cortisol levels over 24 hours between a normal individual and a Cushing syndrome patient.

A diagram showing the stages of meiosis in a cell with 2n=4, with crossing over events marked and a table of possible gamete combinations.

Diagram of transpiration pathway with data table and bar graph showing relationships between humidity, temperature, transpiration rate, and stomatal aperture.

A diagram showing eukaryotic mRNA processing in three steps. Step 1 Pre-mRNA shows exons and introns in alternating segments, but incorrectly shows the 5-prime cap added to the 3-prime end and the poly-A tail added to the 5-prime end. Step 2 Splicing shows introns being removed. Step 3 Mature mRNA shows joined exons with the cap and tail on the wrong ends.

A diagram of the global carbon cycle showing a landscape with the atmosphere at the top, a forest on the left, an ocean on the right, and underground fossil fuel deposits at the bottom. Arrows show carbon movement between reservoirs with flux values in gigatons of carbon per year. Photosynthesis: 120, Cellular Respiration: 60, Decomposition: 60, Fossil Fuel Combustion: 9.5, Ocean Absorption: 92, Ocean Release: 90.

A data table showing genotype frequencies for a snail population. Columns: Genotype, Observed Count, Expected Count. Rows: BB banded 42 observed 36 expected; Bb banded 84 observed 96 expected; bb unbanded 74 observed 68 expected; Total 200. Below: Calculated chi-square = 3.03. Critical values: df=2, p=0.05, critical value = 5.99; df=2, p=0.01, critical value = 9.21.

A diagram showing a narrow glass capillary tube in a beaker of water. Water level inside the tube is higher than in the beaker. The meniscus is concave. Arrows labeled adhesion point from water to glass wall. Arrows labeled cohesion point between water molecules. The height difference is labeled h.

AP Biology Practice Set