Which of the following is NOT associated with viruses?
A) organelles
B) nucleic acid
C) envelope
D) chemical reactions
E) protein coat
A
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Autosomes represent ____
A. all chromosomes including the sex chromosomes B. the half of the chromosomes inherited from one parent C. all chromosomes other than the sex chromosomes D. chromosome pairs with unlike members E. those chromosomes found only in gametes
If the first primitive cells on Earth were heterotrophs, they must have
A. received organic molecules from autotrophs. B. had DNA as their genetic material. C. manufactured their own organic matter. D. None of these answers is correct.
What is the path of urine from formation to excretion in the mammalian kidney?
A. collecting duct ? renal pelvis ? ureter ? urinary bladder ? urethra B. renal pelvis ? ureter ? urinary bladder ? urethra ? collecting duct C. ureter ? collecting duct ? renal pelvis ? urinary bladder ? urethra D. collecting duct ? ureter ? urinary bladder ? renal pelvis ? urethra E. urethra ? collecting duct ? renal pelvis ? ureter ? urinary bladder
Recovery from a mass extinction requires about how
long? a. 100,000 years b. none of these because recovery is never possible c. about as long as the extinction required d. less than one million years e. at least 10 million years