The Barr body is the X chromosome in the cell that is expressed, whereas the other X chromosome is inactivated
Indicate whether the statement is true or false
FALSE
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The bending of light rays as they pass from one medium to another is called refraction.
Answer the following statement true (T) or false (F)
Natural selection is based on all of the following except:
A. the best-adapted individuals tend to leave the most offspring B. genetic variation exists within populations C. populations tend to produce more individuals than the environment can support D. individuals adapt to their environments and thereby, evolve E. individuals who survive longer tend to leave more offspring than those who die young
Water takes longer than air to warm up or cool off because of water's high
A) specific heat. B) viscosity. C) surface tension. D) density.
You have been assigned to analyze some extraterrestrial material recently collected from Mars. After examining a sample using a microscope, you jump up excitedly and shout to your colleagues that you have confirmed the existence of life on Mars. One of your colleagues takes a look at your sample and remarks that all he sees is a single-celled "blob" with little internal structure. Assuming that life on Mars can be classified into similar domains and kingdoms as Earth, to which domain does your "blob" belong?
A. Protista B. Archaea C. Fungi D. Animalia