Which of the following would not be seen in a cross-section through the woody part of a root?
a. sclerenchyma cells
b. parenchyma cells
c. sieve-tube elements
d. root hairs
e. vessel elements
Answer: d. root hairs
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Four of the five answers listed below are haploid cells. Select the exception
a. zygote b. spore c. egg d. sperm e. gamete
Which of the following animals have broad,
flat molars and reduced canines?
a. cows b. cats c. wolves d. humans e. more than one of these
Moderate soil acidity means there are protons in the soil. Protons help nutrient availability by _____.
A. increasing the cation binding to soil particles B. promoting cation exchange C. promoting cellular respiration in root cells D. leaching away the cations from soil after heavy rains
Several lines of evidence, including fossils and a genetic analysis of different groups of modern humans, suggest that our species originated and spread out from:
A) east Africa. B) central Europe. C) India. D) north Africa.