Bacillus licheniformis secretes a compound that inhibits the growth of other Gram-positive bacteria. This is an example of a(n)
A) analog.
B) antibiotic.
C) chemotherapeutic.
D) porin.
E) toxin.
B
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Answer the following statements true (T) or false (F)
1. The plant hypersensitive response is one in which the plant is unable to defend itself against a pathogen. 2. Generally plants are unable to produce chemicals that travel throughout the plant to protect against pathogens; most defense is only in localized areas. 3. When scientists breed for genes for resistance to pathogens or herbivores they are usually limited to making mutations for this to happen. 4. Cytokinins are transported through the xylem to meristems where they aid in cell elongation.
Primary growth at the apical meristems can produce cells that differentiate into each of these cell types, except which?
A. leaves B. ground tissue C. procambium D. cork cambium E. epidermis
In an agricultural field where pesticides are regularly sprayed, there are always some insects
that survive due to some innate resistance based on their genetic makeup. These are the ones that then reproduce so that in future generations there are more insects/pests that are resistant to the pesticides. Over time, this may give rise to an entire population that is resistant to the pesticide. This is an example of
a. homology. b. natural selection. c. experimentation. d. classification
A sample of Chargaff's data on the DNA base composition in various species is provided. Discuss several conclusions that may be drawn from this data.SPECIESATGCHuman31.031.519.418.4Fruit fly27.327.622.522.5Corn25.625.324.524.6Neurospora (fungus)23.023.327.126.6E. coli (bacterium)24.624.325.525.6
What will be an ideal response?