A) sperm are to pollen.
B) sperm are to anthers.
C) pollen is to carpels.
D) pollen is to sepals.
B) sperm are to anthers.
C) pollen is to carpels.
D) pollen is to sepals.
Unsaturated tails tend to __________ at the sites of
their double bonds.
a. dissolve
b. kink or bend
c. separate
d. react with ions
e. do none of these
Answer: b
Biology & Microbiology
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In flowering plants, eggs are to ovules as
Biology & Microbiology
In the microdroplet culture method, cells from mixed assemblages are encapsulated in a gel matrix. The matrix is then emulsified to generate gel "microdroplets"; each microdroplet contains a mixture of cells.
Answer the following statement true (T) or false (F)
Biology & Microbiology
The antibiotic rifamycin is selectively toxic in blocking protein synthesis in Mycobacterium tuberculosis because
A. the antibiotic binds to the mRNA once synthesized, preventing it from participating in the initiation complex with the ribosome. B. it binds preferentially to bacterial RNA polymerase rather than the eukaryotic protein, effectively halting transcription in the pathogen but not the host. C. bacterial ribosomes are 70s whereas host ribosome are 80s, thus the antibiotic binds to the M. tuberculosis ribosome but does not bind to the eukaryotic machinery. D. the drug binds to the initiator tRNA, preventing the formation of the protein synthesis initiation complex in the bacterial cell.
Biology & Microbiology
Darwin was influenced by which concept attributable to Charles Lyell?
a. The geological history of Earth is a series of catastrophes. b. Acquired characteristics can be inherited. c. Natural selection operates on the tremendous variation found in nature. d. All life forms a part of a great Chain of Being. e. Gradual geologic forces formed the earth's current landscape over a long period of time.
Biology & Microbiology