As succession proceeds, what occurs with animals living in the habitat?
A) Animals adapt to the new vegetation.
B) Animals leave as their habitat disappears.
C) New animal species evolve in response to vegetation.
D) Animal species diversity continually decreases.
B
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The total number of individuals in a given area of habitat is the
a. population density. b. population growth. c. population birth rate. d. population size. e. carrying capacity.
Catalytic proteins are known as ________ whereas catalytic RNA molecules are known as ________.
A. ribozymes; enzymes B. enzymes; catalozymes C. enzymes; ribozymes D. catalozymes; ribozymes
In 2012, Lance Armstrong was stripped of his record-setting, seven Tour de France titles and banned for life from competitive cycling because of his alleged use of performance-enhancing drugs (PEDs). One of the PEDs Armstrong was accused of taking is erythropoietin (EPO). Why would systematic use of this PED give Armstrong an unfair advantage in a bike race?
A. EPO stimulates the synthesis of myoglobin by muscle cells. B. EPO stimulates the formation of new alveoli in the lungs. C. EPO stimulates formation of new capillary beds in skeletal and heart muscle. D. EPO increases cardiac output by stimulating the ventricles to contract more strongly. E. EPO stimulates red blood cell production by the bone marrow. F. EPO stimulates growth of cardiac and skeletal muscle tissue. Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about erythropoietin? What other information is related to the question? Choose Answer Given what you now know, what information is most likely to produce the correct answer? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Female silk moths secrete a chemical called bombykol to attract male silk moths. Bombykol is a
A. stimulus. B. pheromone. C. method of communication. D. All of these answers are true.