In which type of transfer do bacteria or archaea take up DNA from their environment and integrate it into their genome?
a. conjugation
b. transduction
c. transformation
d. all horizontal
e. vertical
c
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German biologist Willi Hennig (1913–1976):
a. established the modern approach to classification. b. documented evolutionary history in his book Phylogenetic Systematics. c. noted that phylogenetic trees can help us to classify organisms according to their evolutionary history. d. All of the above.
How many water molecules are produced during the formation of a triglyceride from fatty acids and glycerol?
A. 3 B. 0 C. 1 D. 4 E. 2
A major biological paradox is that genes are generally highly conserved and yet
A. there is very little difference among life forms existing today. B. there is so much diversity among life forms existing today. C. there are a huge number of ancestral genomes no matter how far back we look. D. there are essentially identical development patterns in all species. E. there is very little research into genomic sequences.
As a result of an increase in phloem solute concentration near a source area, the fluid in the sieve element becomes ____
a. hypotonic b. hypertonic c. low turgor d. low-sugar e. dilute