What cellular organelle is especially abundant in phagocytic white blood cells?
A. nuclei
B. nucleoli
C. ribosomes
D. lysosomes
E. Golgi apparati
Answer: D
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What type of evidence shows that endocrine disruptors in the water supply can cause human reproductive problems?
A) correlative B) definitive C) statistically significant D) entirely absent
In the accompanying figure, which label designates the structures largely responsible for attracting potential
pollinators? a. 1 b. 3 c. 7 d. 8 e. 10
Interspecific competition is a density-independent factor
Indicate whether the statement is true or false
Choose the phrase that best represents microevolutionary change.
A. darker skin after hours spent in a tanning booth B. major episodes of extinction C. changes in allele frequency in a population D. new forms of animals replacing older ones