In order for the dissociation element (Ds) mutations in corn to be stable,
A) an Ac element must be present.
B) an Ac element must not be present.
C) the Ds must contain the gene for transposition.
D) the DNA must not be replicated.
E) None of these
B
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What was a main factor in why Sir Alistair Hardy wanted to study the Antarctic seas? a. To study the evolution of whales for science
b. To study the biology of fish for harvesting. c. To study the biology of whales for efficient commercial exploitation. d. To study the distribution of whales for science.
The first organisms
a. had to be aerobic. b. were pathogenic. c. had to be anaerobic. d. were heterotrophs. e. were multi-celled
Which statement is true about sudden cardiac arrest?
a. It happens about 20,000 times annually in the United States. b. It is usually caused by a birth defect when it happens in people aged 36 or younger. c. Its survival rate can be increased by performing a tracheotomy d. It occurs only in the elderly. e. Its survival rate increases about 10% through the use of CPR.
The lower portion of the uterus is called the endometrium
____________________ Indicate whether the statement is true or false.