The structure labeled "c" in the following figure is called the ________.
Fill in the blank(s) with the appropriate word(s).
Answer: centromere
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Amy receives a plant from her mother as a housewarming gift. She waters it regularly and keeps the plant on a windowsill that gets regular sunlight. Amy is determined to keep her mother's gift growing well and never moves the plant for fear of "hurting it," but the plant has started growing toward the window. Amy is puzzled as to why her plant is lopsided. What is happening to Amy's plant?
a. The plant is receiving too much water. b. The plant's gravity sensing mechanism is damaged, a process known as gravitropism. c. The plant is searching for support, a process known as thigmotropism. d. The plant is growing toward the light source, a process known as phototropism. e. The plant has weak structural tissue due to a nutrient deficiency of the soil.
The difference between results obtained from a subset and results obtained from the whole is known as the ____
a. sampling error b. probability c. statistically significant d. sample size e. controlled variable
The science that deals with when diseases occur and how they are transmitted is called
A) ecology. B) epidemiology. C) communicable disease. D) morbidity and mortality. E) public health.
Which of the following sets of characteristics describes the highest level of threat potential from biological weapons?
A. a waterborne toxin that is easily introduced into public water supplies and does not replicate in humans B. a pathogen of livestock transmitted by contact with infected animals but not infected people C. a human pathogen easily produced as an aerosol and transmissible by respiratory aerosols D. a pathogen of wheat that could be delivered using crop dusters E. a microbe that can be introduced into food during packaging and withstands refrigerator temperatures but not typical cooking temperatures