Individuals with variations that make them best suited to their environment are, on average, more likely to ________.
A. survive and reproduce
B. evolve
C. change over time
D. become larger
Answer: A
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Which of the following best describes the process of ventilation?
A) the movement of oxygen gas through the blood of the circulatory system B) the movement of carbon dioxide gas through the blood of the circulatory system C) the movement of the respiratory medium past the respiratory surface D) the diffusion of gases into and out of the circulatory system E) the diffusion of gases into and out of tissues where cellular respiration occurs
In prokaryotes, the DNA molecule that makes up a chromosome is ____ and has ____ replication origin
a. circular; one b. circular; more than one c. linear; more than one d. linear; one e. linear; no
Which muscle extends the leg at the knee?
a. gluteus maximums b. biceps femoris c. gastrocnemius d. sartorius e. quadriceps femoris
Emeliano was flying nonstop from Los Angeles to Tokyo on an important business trip — more than 14 hours in the air. As a result of sitting with his legs bent not being able to walk around, which of the following circulatory conditions does he risk
having? A) low blood pressure B) deep vein thrombosis C) coronary angiography D) atherosclerosis