In the above figure, which letter points to the testis?
A) A
B) B
C) C
D) D
E) E
Answer: A
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Organisms with a circulating body fluid that is distinct from the fluid that directly surrounds the body's cells are likely to have _____
A) an open circulatory system B) a closed circulatory system C) a gastrovascular cavity D) branched tracheae E) hemolymph
The order in which codons are read determines the ____
Help with this would be great, thanks.
A particular segment formed during normal Drosophila development
A. will always form the same structures in adult flies. B. can form different structures, depending on positional information received by the segment during early development. C. is only important to early developmental stages. D. will express different transcription factors in different individuals. E. will become ectoderm, endoderm, or mesoderm.
Which of the following families of cytokines play a central role in the inflammatory response by stimulating cell migration and attracting phagocytic cells and lymphocytes?
A) Chemokines B) Hematopoietins C) Interleukins D) Tumor necrosis factor (TNF)