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1) How can a radioactive tracer be used to follow atoms?
2) fill the blank
Electrons of an atom are known to have their own potential energy.
The ______ charged electrons are attracted to the _________ charged nucleus. To move to an electron shell farther from the nucleus, an electron must _________ energy; energy is _______ when an electron moves a closer shell. (Hint: Use Figure 2.8 “Energy levels of an atom’s electrons” to help you)
3) How does evaporative cooling contribute to the stability of bodies of water (i.e. lakes and ponds) while also preventing from overheating? Explain in terms of the properties of water and heat of vaporization and give an example.
4). Define molarity:
a. What are the units used to define a molar concentration? _____________
b. How does this term relate to aqueous solutions and to biology?
Distribute one cup with sugar water and one with fresh water. Take a sip of the sugar water and swish it around in your mouth for several seconds without swallowing it; gradually, it has to tasteless sweet. After swallowing it (or spitting it back in..
Why benefits are strategically significant to employers and what is some main strategic consideration. What parts of the cell did molecules in this tube probably come from? Describe briefly.
There has not been rain for many months. A biologist is driving down the highway and notices that a big number of corn fields have corn that is wilted and short.
Carotenoids are frequently found in foods that are considered to have antioxidant properties in human nutrition. What related function do they have in plants.
What is one way you might get bacteria of part b growing again without changing the medium. What result could be predicted if you were to transfer the bacteria of part a to the medium containing only unsaturated fatty acids without making any other ..
A botanist takes a sample of 300 plants from a population and determines the genotype of each one for an esterase locus. The locus has two alleles segregating in the population
Explain why would we evolve so that when we are stressed our immune system is suppressed? Discuss how would this increase survival? What is the adaptive value of reflexes?
Give a probable explanation for the inheritance of the melanotic mutation. A 19 year old model for Glamour magazine tripped over an extension cord causing injury to her epidermis. She is afraid injury will leave a scar. Based on your information of r..
Determine which types of cells can we derive continuous cell lines? From which types of cells can we? Derive finite cell lines? From which types of cells do we derive mature differentiated cells?
What are the underlying mechanisms that help assist a species to originate using sympatric speciation although they are not reproductively isolated like in allopatric speciation.Diversity within species that is using sympatric speciation.
Suppose the diameter of the field of vision in your microscope is 2mm under low power. If one Bacillus cell is 2 micrometers how many Bacillus cells could fit end to end across the microscope? How various 10 micrometers yeast cells could fit across t..
How will a scientist predict the relative frequencies
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