Tetrapods colonized land at about the same time as the early _____ radiations around _____ million years ago
A. plant; 575
B. hemichordate; 542
C. arthropod; 420
D. insect; 360
E. plant; 100
D
Biology & Microbiology
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Which of the following is the most direct source of energy for cotransport?
-the movement of one of the transported substances up its concentration gradient -the movement of one of the transported substances down its concentration gradient -ATP hydrolysis -ATP formation cotransport requires no energy
Biology & Microbiology
Blood pressure is highest in the __________
a. veins b. arteries c. capillaries d. venules e. arterioles
Biology & Microbiology
What is the principal energy storage molecules of plants and animals?
A. sugars. B. proteins. C. lipids. D. vitamins. E. carbohydrates.
Biology & Microbiology
In the process of DNA replication, which of the following is responsible for making the RNA primer
What will be an ideal response?
Biology & Microbiology