The sting of imported fire ants can cause
a. fluid filled pustules that are slow to heal.
b. nausea.
c. dizziness.
d. death.
e. all of these.
Answer: e
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Fossil evidence places the origin of angiosperms in the Jurassic period, at least 144 million years ago. The major lineages of angiosperms today were in place approximately 100 million years ago. Now, angiosperms make up 95% of all modern plant species. What relationship between angiosperms and animals may have aided the rapid diversification of flowering plants?
A. Animals eating the plants helped to disperse both pollen and seeds. B. Competition with animals helped spread pollen and seeds. C. Animals died off, allowing more plants to survive. D. Animals became carnivores, allowing plants to survive. E. Coevolution with animals helped spread pollen and seeds.
Which ion plays the most prominent role in the opening and closing of stomata?
a. Cl- b. K+ c. Na+ d. Ca2+
Opercula are
A. extensions of the body wall in polychaete worms. B. gill covers on a fish. C. internal spaces in a planarian used in digestion and respiration. D. gills on a lobster. E. tentacles on a hydra.
In indirect development, the embryo hatches into a sexually immature stage called a larva
Indicate whether the statement is true or false