What stain is used to color endospores?
What will be an ideal response?
Malachite green
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A mass extinction, perhaps caused by a large asteroid hitting Earth near the Yucatan peninsula in the Cretaceous period, produced_____________, which created uninhabitable conditions.
A. active tectonic plate movements that rapidly repositioned continental plates B. All of the answer choices are correct. C. massive volumes of soot, and triggered major climate changes D. forest and range fires over hundreds of years E. a large numbers of volcanic eruptions for millions of years
An ecological footprint
A) is a means of determining increases in populations that lived in the past. B) is a means of understanding resource availability and usage. C) measures dispersion and adaptability. D) will estimate population movements.
Chargaff's rules for the pairing of nitrogen bases is
A. A = T and G = C. B. A+T = G+C. C. A = C and G = T. D. A = G and C = T.
Which blood vessel type can function as blood volume reservoirs?
a. veins b. arteries c. arterioles d. capillaries e. ventricles