In order to prove that a bacterium is pathological according to Koch’s postulates, all of the following
must be true, EXCEPT
a. The bacteria must be present in every case of the disease
b. The bacteria must be isolated from the infected host and grown in pure culture
c. The specific disease must be induced when a pure culture of the bacteria is introduced into
a healthy host
d. The bacteria must be isolated from the now experimentally infected host
e. The bacterium must produce spores that can be transmitted from one individual to another
E
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Which of the following statements best describes the function of the xylem?
A. It transports water from the roots to the stems and leaves. B. It transports food between the leaves and the roots. C. It transports minerals from the roots to the stems and leaves. D. It transports both water and minerals from the roots to the stems and leaves. E. It transports water from roots to leaves and food from leaves to roots.
Photoperiodism is the
a. duration of flowering in a plant. b. amount of light needed by a plant to exhibit normal growth. c. response of a plant to the duration of light and darkness. d. light phase of photosynthesis during which photolysis of water occurs. e. opposite of photorespiration
Meiosis in females is not complete until ________ occurs
Fill in the blank(s) with correct word
Many metabolic pathways are ultimately concerned with ATP; either with the generation of ATP, or with the requirement of ATP for that pathway to function. Why is ATP so important to metabolism?
A. Hydrolysis of the bond between adenine and ribose in ATP is commonly used to release energy that can be used to drive other cellular reactions B. ATP is a protein that serves as the energy currency of cells C. Hydrolysis of ATP is used to drive exergonic reactions D. The phosphate groups of ATP are held together by unstable bonds that can be broken to release energy