In this scenario, how are the soap, dirt/oil, and water arranged at the molecular level?
A) The soap molecules encase the dirt/oil within a small droplet that has a hydrophobic exterior and a hydrophilic interior.
B) The soap is converted into a lipid that binds to the dirt/oil while repelling the water.
C) The soap molecules encase the dirt/oil within a small droplet that has a hydrophilic exterior and a hydrophobic interior.
D) Water and dirt/oil form covalent bonds inside a small droplet that has a soap-based outer membrane.
C
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. One of the advantages of PCR is the ability to ____
a. sequence DNA b. transcribe DNA into mRNA transcripts c. make millions of copies of the entire genome d. double the amount of a rare DNA sequence e. make millions of copies of a rare DNA sequence
A photograph formed using a microscope is called a(n) ____
a. spectrograph b. x-ray c. stereograph d. micrograph e. microphoto
Which statement best describes autotrophic organisms?
a. Autotrophs are exemplified by fungi. b. Autotrophs are exemplified by animals. c. Autotrophs cannot carry out cellular respiration. d. Autotrophs depend on heterotrophs for food. e. Autotrophs synthesize complex molecules from CO2, water, and energy.
The outer portion of the "ground tissue" of a stem is referred to as its:
A) cortex. B) pith. C) mesophyll. D) sepal.