Initial exposure to __________ produces upper airway irritation and a choking sensation.
A) soman
B) chlorine
C) phosgene
D) phosgene oxime
Answer: B) chlorine
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One of the early groups of organisms to evolve is the placozoans. Placozoans have some similar characteristics to fungi. Which of the following is not a characteristic that is shared by fungi and placazoans?
A. upper and lower epithelial layers B. high surface area-to-volume ratio C. gas exchange via diffusion D. extracellular digestion
It is considered healthy to have high levels of high-density lipoproteins (HDL). Why is this true?
A) HDL is important in making complete proteins. B) HDL moves cholesterol to the heart. C) HDL moves cholesterol to the liver for disposal. D) HDL is a form of saturated fat.
When plants undergo allopatric speciation, an initial reproductive barrier is often
A) polyploidy. B) gametic isolation. C) temporal isolation. D) pollinator choice.
Choose the true statements about the diversity of Darwin's finches on the Galápagos Islands. Check all that apply.A) All of the finch species share a common ancestor that colonized the islands.B) Prior to the adaptive radiation of finches, there were no unoccupied habitats in the Galápagos Islands.C) Competition among finches for food sources led to character displacement of beak shapes.D) Beak shape is not an important key innovation.
What will be an ideal response?