Scientists used DNA similarity to track down the Golden State Killer by comparing crime scene DNA with public databases. We also see that closely related species are more similar in their DNA than distantly related species. Which evolutionary pattern is best described here?
A. convergent evolution
B. anatomical homology
C. fossil record
D. molecular homology
Ans: D. molecular homology
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Which of the following actions occurs in many plants when CO2 concentrations are high?
A. Guard cells lose turgor, and the stomata close. B. Water evaporates at a higher rate than usual. C. CAM photosynthesis fixes CO2 at night. D. Oxygen is used by plants for photosynthesis. E. Calcium ions are transported faster through the phloem.
Which of the following is involved in the process of photosynthesis?
a. smooth endoplasmic reticulum b. ribosomes c. stroma d. mitochondria
Oxygen-poor blood circulates through the component(s) labeled as ____
a. A b. B c. C d. D e. A, C, and E
Most of the organs of the human body, for example the heart and lungs, are found in the posterior cavity, which is divided into the thoracic and abdominal regions.
a. true b. false