Which of the following is NOT true concerning plant tissue culture?
(a). New plants can be cultivated from any existing plant cell.
(b). Most plant cells are totipotent, meaning an entire plant can be produced from one cell.
(c). Hormones can be used to cause the production of shoots from tissue.
(d). Plants can be produced from shoot tips, leaves, and anthers.
(e). Foreign genes such as those from other plants or even animals can be inserted into plant cells.
Ans: (a). New plants can be cultivated from any existing plant cell
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Which of the following is a major growth-limiting micronutrient that influences microbial growth?
A) iron B) transferrin C) lactoferrin D) sugar
When does recombination occur?
A) before DNA replication B) at the two-strand stage, when each member of a homologous chromosome pair is composed of two sister chromatids, and before DNA replication C) at the four-strand stage, when each member of a homologous chromosome pair is composed of two sister chromatids, and before DNA replication D) at the two-strand stage, when the sister chromatids have been separated, and after DNA replication E) at the four-strand stage, when each member of a homologous chromosome pair is composed of two sister chromatids, and after DNA replication
How are association studies different from the typical studies, which attempt to link a DNA marker to
a trait? A. Different types of DNA markers are employed. B. More DNA markers are analyzed simultaneously. C. Unrelated individuals are studied rather than families. D. Much larger family groups over more generations are studied. E. A broader description of the trait is employed.
Prokaryotes generally range in size from
A. 20-300 mm. B. 10-100 µm. C. 10-400 nm. D. 50-100 nm. E. 1-10 µm.