What is the portion of a dicot seedling below the cotyledons called?
A. hypocotyl
B. subcotyl
C. plumule
D. internode
E. epicotyl
Answer: A
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All of the following choices delay or block expression of a gene except ________
a. expression of a microRNA complementary in sequence to the gene b. the binding of a repressor to certain sites on DNA c. methylation of DNA d. the binding of an activator to a promoter
Which of the following is not true of an organism's genotype?
A. It contains structural genes that code for proteins. B. It has expressed traits governed by the genes. C. It contains genes that code for RNA. D. It has regulatory genes that control gene expression. E. It is inherited.
When DNA fragments are inserted into plasmids, the resulting recombinant molecules must be introduced into ____ in
order for the DNA to be replicated.
a. rabbits b. humans c. bacteria d. mice e. chimpanzees
The structure of the angiosperm that supplies nutrients to the germinating seedling is the:
a. Endosperm b. Fruit c. Seed coat d. Spore coat e. Pollen grain