We have all heard that dietary fats are linked to higher incidences of heart disease and cancer in humans. Choose the proper hypothesis that a scientist can test.
A. Fat levels above 30% of calories in the diet are correlated with an increase in heart disease.
B. Dietary fat, heart disease, and cancer are all somehow interrelated.
C. Eating a diet of lard makes you fat.
D. Eating more meat causes cancer.
Answer: A
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What is the most likely explanation for how a group of crocodiles acquired the trait in which lower incubation temperatures give rise to male crocodiles?
A. Horizontal gene transfer from a related species has introduced changes in this group’s genome. B. Horizontal gene transfer from a related species has introduced changes in this group’s proteome. C. One or more mutations in the genome have been passed through the group by vertical descent. D. One or more mutations in the proteome have been passed through the group by vertical descent.
What two abiotic factors are considered to most affect organisms?
a. fire and water b. the atmosphere and fire c. temperature and fire d. temperature and water e. climate and fire
How much air enters the lungs of an average-sized adult when breathing normally?
A) 750 milliliters B) 1,000 milliliters C) 275 milliliters D) 125 milliliters E) 500 milliliters
TRAIT SPECIESABCDE101111200111310101401111500001610101 The table shows the distribution of traits (A-E) in six extant species (1-6). A "0" indicates the ancestral condition, and a "1" indicates the derived condition. Which pair of species shares the greatest number of derived characters (synapomorphies)?
A. 6 and 3 B. 6 and 1 C. 5 and 6 D. 1 and 4 E. 5 and 1