What happens when living R strain Streptococcus pneumoniae bacteria are mixed with heat-killed S
strain Streptococcus pneumoniae bacteria?
a. The S strain bacteria come back to life.
b. The R strain bacteria are killed, and the S strain bacteria remain dead.
c. The R strain bacteria are transformed into S strain bacteria.
d. The S strain bacteria are transformed into R strain bacteria.
e. The R strain bacteria are killed, and the S strain bacteria come back to life.
C C
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Which of the following is common to both meiosis and mitosis?
a. DNA replication must occur prior to these divisions. b. Homologous pairs must form. c. Cytokinesis occurs twice. d. The chromosome number does not change
What is the independent variable in this figure?
A. temperature B. amount of pollen collected C. glucose production D. rate of oxygen production E. rate of carbon dioxide production
Amino acids are the building blocks for
a. proteins. b. carbohydrates. c. nucleic acids. d. fats. e. steroids.
The molecules responsible for membrane transport are
A) steroids. B) phospholipids. C) carbohydrates. D) proteins.