Most of the water absorbed by the plant enters through the
A. root apical meristem.
B. root cap.
C. root hairs.
D. stomata.
Answer: C. root hairs
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The ability to tolerate lactose throughout life most likely arose in ________
A) populations that live in cold climates B) populations that live in wet climates C) cultures that keep dairy herds D) Native Americans
All of the following are characteristics of mitochondria and chloroplasts EXCEPT
A) both synthesize ATP. B) both can capture the energy of sunlight. C) both likely evolved from prokaryotic bacteria. D) both are surrounded by a double membrane. E) both possess their own DNA, independent of the nucleus.
Speciation may be promoted within a complex tropic ecosystem due to increasing what?
a. habitat heterogeneity b. habitat homogeneity c. competition d. predation
Which habitat is home to a third of the world’s marine fish species and is particularly at risk because of both the pet trade and warming oceans?
a. Isolated islands b. Cold water lakes c. Equatorial forests in Africa d. Coral reefs