Which structure is in direct contact with the soil into which it is growing?

a. pith
b. endodermis
c. pericycle
d. epidermis
e. cortex


d

Biology & Microbiology

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The gradient distributions of alleles across continents reflect _____

a. the delineation of new races b. genetic drift c. human migration patterns d. protective alleles e. natural selection

Biology & Microbiology

In pea plants, the allele for tall (T) is dominant to the allele for short (t). The genotype for a short pea plant is ________.

A) Tt B) tt C) Tt or tt D) TT or tt

Biology & Microbiology

Which vessel, A, B, C, or D, carries blood to the human lungs?

1.A 2.B 3.C 4.D

Biology & Microbiology

Which of the following is not an element standardized in susceptibility testing?

A) cation concentration B) bacterial inoculum size C) pH D) patient specimen source

Biology & Microbiology