The function of pits in the walls of tracheids is
A. allowing the passage of water.B.
stopping backflow of water.
C. secretion of resin.
D. sealing off air bubbles.
E. allowing the escape of air.
A. allowing the passage of water.B.
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Homologous chromosomes are:
A. a pair of chromosomes that match in size. B. a pair of chromosomes that match in appearance. C. a pair of chromosomes that have the same genes in the same position. D. All of the answer options are correct. E. None of the answer options is correct.
The scientific approach that classifies organisms based on evolutionary relationships is known as ____
a. comparative morphology b. evolutionary ecology c. taxonomy d. cladistics e. genetics
Tooth morphology is not related to diet
a. True b. False
Which of the following is an example of in vivo gene therapy?
A) Using retroviruses to deliver therapeutic genes directly into a patient B) Pharmacogenomics C) Using retroviruses to deliver therapeutic genes into cultured cells D) Injecting stem cells into a patient E) None of these choices