A chemical called endogenous pyrogen may be released from lymphocytes that are responding to a pathogen. What does this compound cause?
A. Fever
B. Activation of NK cells
C. Antibody production
D. Inflammation
Answer: A. Fever
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Of these 4 genotypic classes of offspring, which arose from a parental gamete produced by the F1 females? (Select all that apply.)
In Drosophila, singed bristles (sn) and cut wings (ct) are both caused by recessive, X-linked alleles. The wild type alleles (sn+ and ct+) are responsible for straight bristles and intact wings, respectively. A female homozygous for sn and ct+ is crossed to a sn+ct male. The F1 flies are interbred. The F2 males are distributed as follows:
A) sn+ ct+
B) sn ct
C) sn+ ct
D) sn ct+
In Drosophila, maternal-effect genes are influential in determining the anterior-posterior organization of the developing embryo
Indicate whether the statement is true or false
The greatest proportion of which two biomes have been converted to agriculture?
a. taiga and tropical rain forest b. tropical rain forest and temperate rain forest c. temperate deciduous forest and temperate grassland d. chaparral and tropical rain forest e. temperate grassland and savanna
What would be a typical phenotypic monohybrid ratio in which a lethal allele is involved?
A) 9:3:3:1 B) 2:1 C) 3:1 D) 6:2:3:1 E) 13:5