Scientists want to determine whether chemical X, a component of fertilizer, is harmful to fish. They treat fish in the
laboratory with increasing amounts of the chemical for one week and then measure their viability. When researchers
designed this experiment, they wrote "chemical X is toxic to fish" in their lab notebook. This statement is a(n) ____.
a. interpretation
b. prediction
c. hypothesis
d. result
e. theory
c
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Very few Gram-positive bacteria utilize the Entner-Doudoroff glycolytic pathway.
Answer the following statement true (T) or false (F)
Which amino acid(s) is/are found only in the cell walls of bacteria?
A. Glycerol B. L-form of glycine C. Diaminopimelic acid D. L-form of methionine E. L-form of glycine AND L-form of methionine
A red blood cell ____
a. does not possess a nucleus b. is made in the plasma c. can divide in the plasma d. has the ability to repair itself e. lives up to 120 months
The ____ gives rise to muscles, bones, and the circulatory system
a. endoderm b. ectoderm c. mesoderm d. blastopore e. mesoglea