Unlike those before him, Aristotle:
a. formulated hypotheses without testing them.
b. recognized the significance of testing one's hypotheses.
c. was the first to develop a philosophy of a natural world driven by physical laws.
d. All of the above
e. B and C.
B
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A 9:3:3:1 phenotypic ratio is expected from a dihybrid cross between a double heterozygote and a fully recessive organism
Indicate whether the statement is true or false
What is the age of the twig in the accompanying figure?
a. 0 years
b. 1 year
c. 2 years
d. 3 years
e. 5 years
If the DNA fingerprint of a suspect does NOT match a blood sample from a crime scene, what can you conclude?
A) The DNA in the blood sample probably degraded in a short period of time. B) The suspect was never at the crime scene. C) The blood sample had to come from another person, but the suspect may still have been there. D) The suspect may have been at the crime scene, because DNA fingerprinting has a large error rate.
A(n) ____ environment is ideal for plant cells, while a(n) ____ environment is best for animal cells
a. isotonic; hypotonic b. hypotonic; isotonic c. hypotonic; hypertonic d. hypertonic; isotonic e. isotonic; isotonic