How does external respiration differ from internal respiration?
A) External respiration is done only by some amphibians, which can exchange gases through their skin.
B) External respiration refers to gas exchange between inhaled air and blood, whereas internal respiration refers to gas exchange between the blood and tissue fluids.
C) External respiration involves gills, whereas internal respiration involves lungs.
D) Internal respiration refers to gas exchange between inhaled air and blood, whereas external respiration refers to gas exchange between the blood and tissue fluids.
E) External respiration refers to gas exchange, regardless of its location, whereas internal respiration refers to the cellular process that metabolizes glucose and results in the production of ATP.
B
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How many hydrogen bonds are formed between adenine and thymine?
a. 1 b. 2 c. 3 d. 4 e. 6
A chromosome contains the following gene order: A B C D • E F G H Which of the following rearrangements represents a paracentric inversion?
A) A B C • D E F G H B) A F G H • B C D E C) A C B D • E F G H D) A F D E • C B G H E) A B C D • H G F E
The difference between taproot and fibrous root systems is that a taproot system:a
consists of many roots of the same size, while a fibrous root system has one main root with lateral roots. b. consists of one main root with lateral roots, while a fibrous root system has many roots of the same size. c. is characteristic of most monocots, while a fibrous root system is usually found in eudicots. d. can be modified for storage, while a fibrous root system cannot. e. is considered adventitious, while a fibrous root system is not.
A new highway is built in an area. Half of a population of a certain species of animal is on one side of the highway and half on the other side. The animals are unable to cross the highway. The highway creates an example of
A. behavioral isolation. B. seasonal isolation. C. geographic isolation. D. polyploidy.