____________ occurs when a chemical signal secreted by the roots of one plant blocks the germination of nearby seeds or inhibits the growth of a neighboring plant.  

A.  Nodulation
B.  Etiolation
C.  Reduction
D.  Allelopathy
E.  The systemic response


D.  Allelopathy

Alleleopathy occurs when a chemical compound secreted by the roots of one plant blocks the germination of nearby seeds or inhibits the growth of neighboring plants.

Biology & Microbiology

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The use of recombinant DNA technology to treat genetic diseases ("gene therapy") has been held back by difficulty

A) delivering cloned genes into target cells and getting the genes to function properly. B) in obtaining the appropriate sequence information from individual people. C) cloning human genes. D) in identifying human genes that cause disease. E) cloning and identifying human genes that cause disease.

Biology & Microbiology

In genetics, what are palindromes?

A) the types of DNA sequences that are cut out by restriction enzymes B) the A-T complementary bases of DNA C) the C-G complementary bases of DNA D) the A-U base pairing between DNA and mRNA

Biology & Microbiology

made of smooth muscle

What will be an ideal response?

Biology & Microbiology

The final product of transcription, after modifications, is called __________

a. complementary gene sequence b. pre-mRNA c. mature mRNA d. remodeled mRNA e. primary mRNA

Biology & Microbiology