The most abundant gas in the atmosphere is oxygen
____________________ Indicate whether the statement is true or false.
False - nitrogen
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A botanist conducted an experiment to test the effect of light on plants. Fifty plants of a flowering species were grown for 60 days under different lengths of artificial daylight. Flowers could be white or pink based on the parent plant genes
The amount of water and fertilizer provided was constant. At the end of the experiment, the size of each leaf for all plants is measured. What is the dependent variable in this experiment? A) duration of artificial daylight B) flower's color C) leaf's size D) duration of the experiment
In flowering plants, fruits develop from the _______.
a) gametangia b) ovary c) seed d) sporangia e) pollen
The person known to history as "Typhoid Mary" never had typhoid fever but was identified by public health officials as a source of Salmonella enterica Typhi. Which of the following is the most accurate description of her in this scenario?
A) contact carrier B) human carrier C) reservoir D) both a human carrier and a reservoir E) a reservoir but not a carrier
A population of squirrels is in a phase of exponential growth. Which events would act to slow this growth? (Check all that apply)
A. heavy rainfall, resulting in larger seed and nut harvest B. logging of nut trees C. growth of the hawk population D. increased population that is outstripping food supply E. less competition from a diminished population of ground squirrels F. a forest fire that destroys habitat