Ferns are more advanced than mosses because mosses lack which structure found in ferns?

a. spores
b. cuticle
c. xylem
d. sporophytes
e. flagellated sperm


c

Biology & Microbiology

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Which of the following is the best definition of autoimmune disease?

A) a condition in which B cells and T cells respond independently to antigens and do not interact correctly B) a condition in which the adaptive immune system fails to recognize the second infection by the same antigen C) a condition in which self molecules are treated as non-self D) a condition in which the immune system creates random antibodies without being triggered by an antigen

Biology & Microbiology

Water follows sodium ions out of the renal filtrate in the tubules and into blood by means of

A. osmosis. B. glomerular filtration. C. tubular secretion. D. tubular reabsorption.

Biology & Microbiology

Which of the following bacteria is a common soil contaminant that may cause disease in humans?

A) Aspergillus oryzae B) Bacillus anthracis C) Cyanobacteria D) Lactoccocus cremoris E) Streptomyces scabies

Biology & Microbiology

What event typically begins in anaphase and is completed soon after the end of telophase?

A) interphase B) packing of DNA into well-defined chromosomes C) cytokinesis D) alignment of chromosomes at the cell equator

Biology & Microbiology