Which of the following types of blood vessels are directly involved in the exchange of materials between blood and tissues?
A) Lymphatics B) Arteries C) Veins D) Arterioles E) Capillaries
E
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The hypothesis that H2 was a key electron donor for energy metabolism in primitive organisms is supported by it being such a common trophic strategy in Aquificae
Indicate whether the statement is true or false.
Lysogenized cells
A. are immune to any further infection by any virus. B. are immune to infection by the same virus. C. may have new properties. D. respond to infection with the SOS response. E. are immune to infection by the same virus AND may have new properties.
Which of Mendel's laws described the separation of two alleles during the formation of gametes?
A. law of segregation B. law of population dynamics C. law of independent assortment D. law of random fertilization E. law of crossing-over
Auxins primarily flow downward in shoots and roots and this transport is called
A. nonpolar. B. dipolar. C. polar. D. bipolar. E. tripolar.