The cell most likely responsible for an immediate release of chemical mediators right at the site of injury is the:
A. Mast Cell
B. Platelet
C. Eosinophil
D. Endothelial
Ans: A. Mast Cell
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According to the principle of segregation, a heterozygous plant with alleles Aa will produce:
A. gametes with only the A allele. B. gametes with only the a allele. C. 50% of gametes with the A allele and 50% of gametes with the a allele, on average. D. gametes in the ratio of 3 A alleles:1 a allele. E. some gametes with the A allele and some with the a allele, but in no predictable ratio.
What is considered a normal blood pressure?
a. 100 / 60 b. 65 / 100 c. 80 / 120 d. 120 / 80 e. 140 / 120
What is the function and macrostructure of the lymphatic system?
What will be an ideal response?
In biology lab, your instructor informs you that carbon-14 dating will demonstrate the use of determining the age of a fossil. Using only this information, you estimate that the age of the fossil must be less than about years old.
A. 75,000 B. 1.3 billion C. 40,000 D. 100,000 E. 300,000