Which of the following statements about monocots is true?
a. They lack sclerenchyma tissue.
b. They have a well-developed vascular cambium.
c. They do not produce bark.
d. Their lateral meristems give rise to wood.
e. Secondary growth occurs rather slowly
C
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Mitochondrial DNA (mtDNA) in humans
A. is always donated to the offspring from both parents. B. can be used to identify related people. C. can be isolated only from intact embryos. D. can be used to establish paternity.
A slimy layer of bacteria coating a surface is also known as
a. prokaryocommune b. bioaggregate c. tissue d. biofilm e. plague
Natural selection has favored the dark form of the peppered moth in areas subject to severe air pollution, perhaps because on darkened trees, moth-eating birds see them less easily. As pollution abated, the light forms increased in the population because
A. birds ate more light moths. B. light moths were able to produce more offspring than dark moths. C. light moths had lower fitness than dark moths. D. light moths were more genetically variable than dark moths.
Campylobacter gastroenteritis is usually caused by ingestion of contaminated poultry
Indicate whether the statement is true or false