The feature of horsetails that was useful before
the invention of modern abrasive cleaners was
(were)
a. rhizomes.
b. the gametophytes.
c. the leaves.
d. cones at the tips of their stems.
e. the stem.
E
You might also like to view...
Because hardly any oxygen (O2) was in the early Earth's atmosphere, the single-celled microorganisms probably used which of the following to produce energy to drive metabolic processes?
A. Aerobic cellular respiration. B. Anaerobic cellular respiration. C. Sulfuric acid respiration. D. Both aerobic and anaerobic cellular respiration. E. Sulfuric acid, aerobic and anaerobic respiration.
Annual influenza vaccinations are important for all individuals because
A. the virus is stable so once the vaccine is administered, protection from antibodies is lifelong. B. the highly contagious nature of the virus means that transmission from a robust individual to those with a weaker immune system, such as the young or the elderly, is facilitated in crowded winter conditions. C. the oral-fecal transmission route makes it easy to pass to others. D. the vaccine prevents secondary infections in individuals with influenza.
Which prokaryotic group is most closely related to eukaryotes?
A) Bacteria B) Protista C) Archaea D) Bacteria and Archaea are equally closely related.
If cells from a wing are transplanted to the leg prior to their determination, into what will they likely develop?
A. A mixture of wing and leg cells B. Undifferentiated cells C. Wing cells D. Cannot be determined E. Leg cells