Potassium-40 can be used to date ________ that are ________ old
A) volcanic rocks and associated fossils; thousands of years
B) volcanic rocks and associated fossils; hundreds of millions of years
C) potassium-rich fossils; millions of years
D) carbon-containing rocks and fossils; up to 75,000 years
Answer: B
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Mendel's monohybrid cross of tall parents with the genotype Tt resulted in a tall to short ratio of
a) 1:1. b) 1:2. c) 2:1. d) 3:1. e) 1:3.
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.
When first viewing a slide should you keep the voltage or your light source at a minimum or maximum?
A) Minimum B) Maximum
Which is an example of a species with K-selected adaptations?
A. dandelion B. bobcat C. herring D. fruit fly