In the soil, ________ convert atmospheric nitrogen into a form that plants can use
A) worms B) fungi C) plants D) insects E) bacteria
E
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All vertebrates have a(n) __________ system of secretory glands and cells.
Fill in the blank(s) with the appropriate word(s).
Motile bacteria have been placed in an environment with a gradient of a chemical attractant. Which of the following behaviors would you predict?
A. The bacteria will only exhibit runs away from the chemical. B. The bacteria will reduce run duration in the direction of the chemical. C. The bacteria will reduce tumbling frequency. D. Bacteria will randomly switch back and forth between runs and tumbles. E. The bacteria will both reduce tumbling frequency and increase run duration in the direction of the chemical.
Most people of African, Asian, and Native
American descent carry the same allele for the melansome gene. What is the function of the melanosome gene product?
a. transport of melanin b. distribution of melanin c. basic synthesis of melanin d. more than one of these e. none of these - it is a mutated gene that is non-functional
The spindle apparatus is composed of
a. Golgi bodies. b. microtubules. c. endoplasmic reticulum. d. nucleoprotein. e. chromatids.