Most scientists believe that prokaryotes evolved from eukaryotes
Indicate whether the statement is true or false.
ANSWER: False - eukaryotes, prokaryotes
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Which portion of the plasma membrane carries out most of the membrane’s specific functions?
a. proteins b. lipids c. carbohydrates d. glycolipids e. phospholipids
Which of the following correctly traces the path of urine?
A) Renal pelvis ? uterus ? bladder ? urethra B) Renal pelvis ? ureter ? bladder ? urethra C) Renal pelvis ? bladder ? ureter ? urethra D) Ureter ? urethra ? bladder ? renal pelvis E) Renal pelvis ? urethra ? bladder ? ureter
Which of the following determines genetic sex (male or female) in mammals?
A. the genetic makeup of the parents B. the Y chromosome contained in the egg C. the SRY gene on the Y chromosome D. the temperature of the developing fetus E. the acrosome of the sperm
Which statement is accurate if the first true cell arose by the RNA-first hypothesis?
A. Proteins in the protocell would have evolved the ability to synthesize DNA. B. The first cell had RNA genes that could have specified protein synthesis. C. RNA genes replicated because of the presence of proteins. D. All of these statements support the RNA-first hypothesis. E. None of these statements support the RNA-first hypothesis.