The cells organelles that are surrounded by DOUBLE MEMBRANES and contain their OWN DNA are the ___________________.
a) nucleus, ER, and lysosomes
b) nucleus, vacuoles, and chloroplasts
c) nucleus, chloroplasts, and mitochondria
d) ER, Golgi bodies, and vacuoles
Answer: c) nucleus, chloroplasts, and mitochondria
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Tubulin may assemble and disassemble simultaneously in a process known as
A) dynamic instability. B) treadmilling. C) microtubule organizing. D) MAP motoring. E) actin-regulated assembly.
What type of receptor modification in the brain would result in increased social behavior of mice?
A. decrease in the abundance of testosterone receptors B. increase in the abundance of epinephrine receptors C. increase in the abundance of ADH receptors D. decrease in the abundance of cortisol receptors E. increase in the abundance of insulin receptors
If there are 10,000 calories of net primary productivity in a field, how much, on average, will be available to a secondary consumer?
A. 100 calories B. 1 calorie C. 10 calories D. 10,000 calories E. 1,000 calories
An organism in an ecosystem that feeds off others is a(n) ____
a. heterotroph b. producer c. autotroph d. photosynthetic organism e. plant