Vascular cambium gives rise to which of the following tissues?
a. primary phloem
b. periderm
c. epidermis
d. secondary xylem
e. cork cambium
D
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Which structure is common to both gymnosperms and angiosperms?
A) stigma B) carpel C) ovule D) ovary E) anthers
Analysis of the nucleotide sequence of the genome of microorganisms has revealed important information about their metabolic potential.
Answer the following statement true (T) or false (F)
Describe the process of transcription in prokaryotes
What will be an ideal response?
Mutations in the DFNA20/26 locus, which codes for the actin gamma 1 protein, are associated with congenital deafness. An irate senator complains that government money is being wasted on studies of this mutant gene-in yeast! "I am no biologist," says the senator, "but I am pretty sure yeast don't have ears." How do you respond?
A. "We can learn valuable information about the transcription of the mutant gene in yeast. It is much more difficult to study transcription in human cells." B. "We can learn valuable information about sound transmission through the mutant yeast. By placing a speaker against a yeast vial and recording sound from the other side, we can infer how the mutant actin affects sound waves." C. "We can learn valuable information about the structure of the mutant protein by expressing it in yeast. It is difficult to collect large amounts of actin from tiny hair cells, and unethical to collect it from human patients." D. "You are right, Senator -- yeast do not have ears. We should revoke the funding immediately."