Which of the following is true of bark?
a) It is composed of phloem plus periderm.
b) It is formed by the apical meristems.
c) It has no identifiable function in trees.
d) It is associated with annuals but not perennials.
e) It forms annual rings in deciduous trees.
Ans: a) It is composed of phloem plus periderm.
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Which of the following statements is true regarding the fruits produced by angiosperms? Select all correct choices
A. Fruits ripen in response to ethylene. B. Fruits are typically derived from the wall of the ovary. C. Fruits are typically derived from the seed coat. D. Fruits ripen in response to far red light.
Cnidarians share a common body plan that takes two forms. The free-floating form is called a ____ , whereas the sessile form is called a ____
Fill in the blank with the appropriate word.
Some members of the Archaea lack a cell wall.
Answer the following statement true (T) or false (F)
Gene amplification involves:a
increasing the affinity of a gene to DNA polymerase. b. extra replication of genes that specify a certain gene product only in cells needing this product. c. improving the accuracy by which a gene is copied to produce an mRNA molecule. d. enhancing the activity of RNA polymerase. e. increasing the size of the gene that encodes a needed protein.