Arabidopsis plants with a mutation in the flp1 gene produce pollen grains that have a smooth surface and are easily damaged. Disruption of what process likely causes this phenotype?
A. double fertilization
B. sporopollenin deposition
C. pollen germination
D. tube cell formation
Answer: B
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________ is a water-soluble hormone derived from the nervous system that regulates blood volume and blood pressure?
A. Antidiuretic hormone B. Aldosterone C. Cortisol D. Oxytocin E. Adrenocorticotropic hormone
Human skin color is an example of ____, while sickle-cell anemia is an example of ____
a. multiple alleles; epistasis b. incomplete dominance; multiple alleles c. polygenic inheritance; pleiotropy d. pleiotropy; polygenic inheritance e. incomplete dominance; pleiotropy
Select the statement that is correct regarding Chagas disease.
A. It is caused by a fungal pathogen. B. Late-stage disease is characterized by autoimmune reactions in the host. C. An effective vaccine is available for prevention in endemic areas. D. It is transmitted by respiratory droplets.
The phrase "Study nature, not books" is attributed to:
a. Louis Agassiz. b. Alexander Agassiz. c. Charles Darwin. d. Charles Wyville Thomson. e. Aristotle.