When treating an organism with a mutagen, although it is possible that homozygous mutations will occur, it is more likely that most new mutations will be heterozygous or hemizygous
Indicate whether the statement is true or false
TRUE
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Which of the following is true of the humoral immune response and not true of the cell-mediated immune response? Only the humoral immune response _____
A) involves T cells at some level B) require CD8+ cells for activation C) involves destroying entire cells and not just the pathogen D) uses antibodies as its main weapon
Despite great diversity, vertebrates share features of which the following basic homeostatic
mechanisms across all lineages?
a. Digestion b. Metabolism c. Respiration d. Digestion and metabolism e. Digestion, metabolism and respiration
Which of the following is TRUE of fetal circulation?
a. The allantois carries fetal blood to the placenta. b. Fetal hemoglobin binds oxygen more easily than the adult form. c. Fetal blood mixes with maternal blood to ensure proper gas exchange. d. Blood flow into the lungs is 50% of adult flow. e. The liver, heart and lungs receive the majority of blood flow.
Bacterial ____ cause systemic symptoms such as fever, whereas bacterial ____ cause more specific maladies
a. phages; prophages b. prophages; phages c. exotoxins; phages d. exotoxins; endotoxins e. endotoxins; exotoxins