Among the fungi, which feature is uniquely present in the chytrids?
A. Polysaccharide capsule
B. Pellicle
C. Cell wall composed of mannans
D. Flagella
Answer: D
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The most common circulating antibody, comprising about 80% of the serum immunoglobin, is
A) IgA. B) IgC. C) IgD. D) IgG.
Submetacentric describes a chromosome whose telomeres are attached to the centromeres
a. True b. False Indicate whether the statement is true or false
What condition triggers apoptosis in immature T-cells?
a. premature exposure to viral pathogens b. sufficiently high T-cell concentrations c. T-cell receptors binding to “self” proteins d. insufficient levels of ATP phosphorylation
A vertebrate paleontologist is hunting through chalk deposits and finds a set of fused clavicles with some other bone fragments. What has she found?
A. The remains of a bird. B. The remains of a lobe-finned fish. C. The remains of a mammal. D. The remains of an amphibian.